Problem: S1: The position of Leader of the Opposition was essentially informal throughout the nineteenth century , with formal recognition only being granted in the early twentieth century .
S2: The position of the opposition leader was essentially informal in the whole of the twentieth century , with formal recognition only being granted in the nineteenth century .

Do S1 & S2 convey the same information?

A: no

Problem: S1: Bagwell countered for a fisherman 's suplex that page went into a diamond cutter .
S2: Bagwell countered for a fishman 's suplex that Page went into a Diamond Cutter .

Do S1 & S2 convey the same information?

A: yes

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

Do S1 & S2 convey the same information?

A:
no