Complex sentence: Jack Halfpenny, the son of Robert F. Halfpenny of Dallas, was a star football player at Dallas Sunset High School where he played well enough to be named to the 1944 Texas High School Coach's Association All-Star game.
Split into simpler sentences: Jack Halfpenny, the son of Robert F. Halfpenny of Dallas, was a star football player at Dallas Sunset High School. In 1944 he made the Texas High School Coach's Association All-Star game.