user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Material emanating from elliptical galaxies' regarding 'Atlas of Peculiar Galaxies'
Table Content:
| Arp Number | Common Name | Notes |
| --- | --- | --- |
| 137 | NGC 2914 | Spiral galaxy with faint spiral arms |
| 138 | NGC 4015 | Interacting pair of galaxies |
| 139 | Arp 139 | Interacting pair of galaxies |
| 140 | NGC 274, NGC 275 | Interacting pair of galaxies |
| 141 | UGC 3730 | Ring galaxy system |
| 142 | NGC 2936, NGC 2937, UGC 5130 | Galaxy triplet |
| 143 | NGC 2444, NGC 2445 | Ring galaxy system |
| 144 | NGC 7828, NGC 7829 | Ring galaxy system |
| 145 | UGC 1840 | Ring galaxy system |


Question
What are the structural differences between NGC 2914 and NGC 4015?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["NGC 2914 (Arp 137) is a spiral galaxy with faint spiral arms and NGC 4015 (Arp 138) is an interacting pair of galaxies."]