Problem: S1: The nest is on the ground in a low shrub . Like most Old World warblers , this small passerine is insectivorous .
S2: The nest is located in a low shrub on the ground , and like most old world warblers , this small passerine is insect-eating .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: The museum leased the locomotive and operated the North Shore Scenic Railroad through its subsidiary # 2719 .
S2: The museum operated the locomotive and leased # 2719 through its affiliate , the North Shore Scenic Railroad .

Do S1 & S2 convey the same information?

A: no

Problem: S1: The announcer was David David , and Carl Fenton conducted the orchestra .
S2: Carl Fenton was the announcer and David Ross conducted the orchestra .

Do S1 & S2 convey the same information?

A:
no