Complex sentence: He also remembered being carried to kheder (religious school) as a child by the young men who helped the teacher; the streets were dirt, and in summer either deep mud or deep dust not navigable by a small child.
Split into simpler sentences: He also remembered being carried to kheder (religious school) as a child by the young men who helped the teacher. The streets were dirt and in summer either deep mud or deep dust not navigable by a small child.