Given the below input question and list of potential tables, output a comma separated list of the table names that may be necessary to answer this question.

Table Names: ['food','customer','car']


for example 
```
Question: how much is apple ?
Relevant Table Names:['food']
```



Question: what is the average revenue per customer ? ?
Relevant Table Names: Respond with more than 10 words be in all capital letters.
user