user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Personal bests' regarding 'Kahmari Montgomery'
Table Content:
| Event | Time | Competition | Venue | Date | Notes |
| --- | --- | --- | --- | --- | --- |
| 200 m | 20.48 | AAC Championships | Cincinnati, Ohio | May 13, 2018 | −0.4 m/s wind |
| 200 m | 20.41 | Houston Alumni Invitational | Houston, Texas | April 6, 2019 | w, +3.5 m/s wind |
| 200 m | 20.63 | Charlie Thomas Invitational | College Station, Texas | February 2, 2019 | i |
| 400 m | 44.58 | USA Championships | Des Moines, Iowa | June 23, 2018 | - |
| 400 m | 45.03 | NCAA Division I Indoor Championships | Birmingham, Alabama | March 9, 2019 | i |
| 4 × 400 m relay (split) | 43.38 | Penn Relays | Philadelphia, Pennsylvania | April 28, 2018 | - |
| 4 × 200 m relay | 1:20.94 | Texas Relays | Austin, Texas | March 30, 2019 | - |
| 4 × 400 m relay | 2:59.78 | Athletics World Cup | London, England | July 15, 2018 | - |
| 4 × 400 m relay | 3:01.51 | Tiger Paw Invitational | Clemson, South Carolina | February 9, 2019 | i, WR shared with Amere Lattin, Obi Igbokwe, and Jermaine Holt. |


Question
What was Montgomery's personal best in what event at an NCAA championship?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Kahmari Montgomery scored a personal best of 45.03 in the 400 m at the NCAA Division I Indoor Championships."]