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_42 (attendance INTEGER, venue VARCHAR, opponent VARCHAR)
### Question:
What is the highest attendance for the match against west ham united at the venue of a?
### Answer:
SELECT MAX(attendance) FROM table_name_42 WHERE venue = "a" AND opponent = "west ham united"