Problem: S1: The first president of Antigone was Stefano Anastasia ( 1991-1999 ) , who were replaced by Mauro Palma ( 1999-2005 ) .
S2: The first president of Antigone was Stefano Anastasia ( 1991-1999 ) , who has been replaced by Mauro Palma ( 1999-2005 ) .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: The languages of the Rai coast are a family of languages in Madang - continent of New Guinea .
S2: The Madang languages are a family of languages in New Guinea - condition of the Rai - coast .

Do S1 & S2 convey the same information?

A: no

Problem: S1: She graduated in 1983 from the Glen High School in Grahamstown and studied at the Rhodes University in Pretoria .
S2: She graduated from The Glen High School in Grahamstown in 1983 and studied at Rhodes University in Pretoria .

Do S1 & S2 convey the same information?

A:
yes