Problem: S1: The Purul River is a tributary of the River Rotunda in Romania .
S2: The Purul River is a tributary of the Rotunda River in Romania .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: Ma Smith is widow with two of her own children : Will and Dora Smith .
S2: Dora Smith is a widow with two children of her own : Will and Ma Smith .

Do S1 & S2 convey the same information?

A: no

Problem: S1: The design of this Japanese porcelain has made Wagener white and blue according to European taste with many flowers .
S2: Wagener made the design of this European porcelain , according to the Japanese taste many , with white and blue flowers .

Do S1 & S2 convey the same information?

A:
no