What is the fine-grained topic of the following text: These were some of the key questions PG&E attorneys faced during a heated hearing last week before U.S. District Court Judge William Alsup, who oversees PG&E’s probation for criminal convictions related to its role in the 2010 San Bruno pipeline explosion. Only return the topic.
PG&E's probation hearing for its role in the 2010 San Bruno pipeline explosion.