Read the excerpt from "Like Mexicans." We had lunch: sandwiches, potato chips, and iced tea. Carolyn and her mother talked mostly about neighbors and the congregation at the Japanese Methodist Church in West Fresno. Her father, who was in khaki work clothes, excused himself with a wave that was almost a salute and went outside. I heard a truck start, a dog bark, and the truck rattle away. How does Soto build a central idea of his story in the excerpt?