What is the grammar of "be buried" in the following sentences?:
The graves have all been found under the houses, right under the floors. And it may be this burial custom that explains why the houses were packed in so tightly without streets. I mean, you might think it was for protection or something, but there has been no evidence found yet of any violent attack that would indicate that kind of danger. It maybe they wanted to live as near as possible to their ancestors’ graves and be buried near them themselves.