Problem: S1: At the Congress , Toxo was supported by the Basque regional secretary Unai Sordo whom Toxo has replaced as candidate .
S2: Toxo was supported at the congress by the Basque regional secretary Unai Sordo , whom Toxo replaced as a candidate .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: It became one of the four British chemical companies that merged with Brunner Mond , Nobel Explosives and Imperial Chemical Industries in 1926 to join the United Alkali Company .
S2: It became one of the four British chemical companies that merged with Brunner Mond , Nobel Explosives and United Alkali Company in 1926 to set up Imperial Chemical Industries .

Do S1 & S2 convey the same information?

A: no

Problem: S1: In Natchez , Ingraham married Mary Brooks , a cousin of Phillips Brooks .
S2: Ingraham married Mary Brooks in Natchez , a cusine of Phillips Brooks .

Do S1 & S2 convey the same information?

A:
no