Problem: S1: The River Milotina is a tributary of the river Vanata in Romania .
S2: The Vanata River is a tributary of the Milotina River in Romania .

Do S1 & S2 convey the same information?

A: no

Problem: S1: In 1955 , this became the Central Electricity Generating Board , which in turn became the Central Electricity Authority in 1957 .
S2: In 1955 , it became the Central Electricity Generating Board , which in turn became the Central Electricity Authority in 1957 .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: The river Voievodeasa is a tributary of the Sucevita River in Romania .
S2: The Sucevita River is a tributary of the Voievodeasa River in Romania .

Do S1 & S2 convey the same information?

A:
no