Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Index | Name | Song | Group Song | Score |
| --- | --- | --- | --- | --- |
| M1 | Isaac 张富泷 | 爱爱爱 | 杀手 | 6.0 + 6.0 + 6.0 + 6.5 = 24.5 |
| M2 | Eddie 赖勇霖 | 不屑纪念 | 杀手 | 7.0 + 7.0 + 7.5 + 6.5 = 28.0 |
| M3 | Jac 林伟明 | 想太多 | 对手 | 6.5 + 6.5 + 7.0 + 5.5 = 25.5 |
| M4 | Cliff 郑至围 | 眼底星空 | 对手 | 7.5 + 6.5 + 7.5 + 6.5 = 28.0 |
| M5 | Alvin 马铭泉 | 两败俱伤 | 对手 | 6.0 + 5.5 + 6.5 + 5.5 = 23.5 |
| M6 | Kevin 邓凯文 | 懂了 | 对手 | 6.5 + 6.0 + 6.0 + 5.5 = 24.0 |
Question:
What song had an index of m6?
Answer:
懂了