Conversation so far:
What were David Marks' early years like?
At age seven, David Lee Marks moved into a house across the street from the family home of the three Wilson brothers.
Who were the three Wilson brothers?
Brian, Dennis, and Carl Wilson
What else happened for David Marks besides what happened during his early years?
The band the Marksmen was initially a side project for David Marks, who was growing tired of his songs being passed over for Beach Boys records by Murry Wilson.

Question: What songs did he make?
Self-contained rewrite: What songs did David Marks make?