Simplify the following text for a Grade 5 native English-speaking person.
Original: It was once part of the north\/south Torrance to San Pedro spur line of the Pacific Electric Railway , that agency 's first interurban line to San Pedro .
Simplified: It was once part of the north\/south Torrance to San Pedro spur line of the Pacific Electric Railway . The line was the railroad 's first interurban line to San Pedro .