Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_40 (constructor VARCHAR, rounds VARCHAR, chassis VARCHAR)
### Question:
Which constructor has 10-12 rounds and a M7A chassis?
### Answer:
SELECT constructor FROM table_name_40 WHERE rounds = "10-12" AND chassis = "m7a"