Problem: S1: During their relationship the pair lived in London and Los Angeles , though Seymour spent more time in Los Angeles for her work .
S2: Throughout her relationship , the couple lived in London and Los Angeles , though Seymour spent more time in Los Angeles for their work .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: The Slanic River is a tributary of the River Comina in Romania .
S2: The Slanic River is a tributary of the Comina River in Romania .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: The song was written by Bryan Adams and had already been recorded by Melanie C in 1999 .
S2: The song was written by Melanie C and was already recorded in 1999 by Bryan Adams .

Do S1 & S2 convey the same information?

A:
no