user
Instruction
Answer the question based on the provided table.


Table
Table Title: List of Legion of Super-Heroes members
Table Content:
| Character | Real name | Home world | Membership notes | Powers |
| --- | --- | --- | --- | --- |
| Night Girl | Lydda Jath | Kathoon | Pre-Crisis version first appeared in Adventure Comics #306 (March 1963).\nLegion membership first mentioned by Starman in Justice Society of America vol. 3, #6 (July 2007) and confirmed in Action Comics #860 (February 2008). | Super-strength when not in direct sunlight. |
| Chameleon Girl | Yera Allon | Durla | Pre-Crisis version first appeared (impersonating Shrinking Violet) in Legion of Super-Heroes vol. 2, #286 (April 1982).\nTrue form and identity revealed in Legion of Super-Heroes vol. 2, #305 (November 1983).\nLegion membership first revealed in Action Comics #861 (March 2008). | Shapeshifting. |
| Karate Kid II | Myg | Lythyl | Joined as a replacement for Val Armorr, as revealed in Final Crisis: Legion of 3 Worlds #1 (October 2008), unlike his counterpart who did not join the original team prior to Crisis on Infinite Earths.\nKilled by Radiation Roy in Final Crisis: Legion of 3 Worlds #3 (April 2009). | Mastery of all known martial arts. |
| Green Lantern | Rond Vidar | Earth | Pre-Crisis version first appeared in Adventure Comics #349 (October 1966); granted honorary membership in Adventure Comics #360 (September 1967).\nLast remaining member of the Green Lantern Corps, as revealed in Final Crisis: Legion of 3 Worlds #2 (November 2008).\nKilled in the same issue by Superboy-Prime. | Possesses a Green Lantern power ring. |
| XS | Jenni Ognats | Aarok | First appeared in Legionnaires #0 (October 1994); granddaughter of Barry Allen and first cousin of Bart Allen.\nNative of the same universe as the post-Infinite Crisis team, as revealed in Final Crisis: Legion of 3 Worlds #3 (April 2009).\nJoined the Earth-247 team in Legion of Super-Heroes vol. 4, #62 (November 1994).\nJoined the post-Infinite Crisis team in Final Crisis: Legion of 3 Worlds #5 (September 2009).\nPost-Flashpoint no longer listed as a member of the Legion. | Superspeed. |
| Gates | Ti'julk Mr'asz | Vyrga | First appeared in Legion of Super-Heroes vol. 4, #66 (March 1995).\nJoined the Earth-247 team in Legion of Super-Heroes vol. 4, #76 (January 1996).\nJoined the post-Infinite Crisis team in Final Crisis: Legion of 3 Worlds #5 (September 2009). | Creation of teleportation "gates". |
| Earth-Man | Kirt Niedrigh | Earth | Pre-Crisis version first appeared (as "Absorbency Boy") in Superboy and the Legion of Super-Heroes #218 (July 1976).\nJoined in Legion of Super-Heroes vol. 6, #2 (August 2010).\nDied battling the Adversary in Legion of Super-Heroes vol. 6, #16 (October 2011). | Super-power absorption and duplication. |
| Comet Queen | Grava | Extal Colony | Pre-Crisis version first appeared in Legion of Super-Heroes vol. 2, #304 (October 1983) as a student at the Legion Academy.\nJoined between Legion of Super-Heroes vol. 6, #16 (October 2011) and Legion of Super-Heroes vol. 7, #1 (November 2011). | Space flight, comet gas extrusion. |
| Chemical Kid | Hadru Jamik | Phlon | First appeared in Legion of Super-Heroes vol. 6, #6 (December 2010) as a student at the Legion Academy.\nJoined between Legion of Super-Heroes vol. 6, #16 (October 2011) and Legion of Super-Heroes vol. 7, #1 (November 2011). | Catalyze chemical reactions. |
| Glorith II | Glorith | Unknown | First appeared in Adventure Comics #523 (April 2011) as a student at the Legion Academy.\nJoined between Legion of Super-Heroes vol. 6, #16 (October 2011) and Legion of Super-Heroes vol. 7, #1 (November 2011). | Manipulation of mystical energies. |
| Dragonwing | Marya Pai | Earth | First appeared in Legion of Super-Heroes vol. 6, #6 (December 2010) as a student at the Legion Academy.\nJoined between Legion of Super-Heroes vol. 6, #16 (October 2011) and Legion of Super-Heroes vol. 7, #1 (November 2011). | Fire breath and acid absorption. |
| Harmonia | Harmonia Li | Earth | First appeared in Legion of Super-Heroes vol. 6, #1 (July 2010).\nJoined between Legion of Super-Heroes vol. 6, #16 (October 2011) and Legion of Super-Heroes vol. 7, #1 (November 2011). | Elemental. |


Question
how many pre-crisis superheros first appeared as students at the legion academy?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["4"]