Given the task definition and input, reply with output. In this task, you're given a context passage. Your job is to generate relevant questions that can be answered by directly referring to the passage.

So yesterday I passed the graveyard my grandma is buried in and got very sad . Like I couldn't stop crying for a few minutes and it just hit me so suddenly . Fortunately , Rob was driving so that was good .
Why did the graveyard make the writer sad ?