What is before in the sentence Sean did his homework football practice?

This sentence is grammatically incorrect. It seems like it's missing a conjunction (like "before", "after", or "and") to connect the two phrases.

To help you understand what might be missing, could you tell me:

* What is the intended meaning of the sentence? Did Sean do his homework *before* football practice, or *after* it? Or something else entirely?

Once I know the intended meaning, I can help you figure out what word goes in the blank.