Problem: S1: In the state elections of November 1856 , 81 Republicans , 31 Democrats and 8 Americans were elected to the Assembly for the 1857 session .
S2: At the State election in November 1856 , 81 Republicans , 31 Democrats and 8 Americans were elected to the Assembly for the session of 1857 .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: At Dagorlad , a great battle took place in which Sauron 's forces were stormed and the Black Gate destroyed .
S2: On the Dagorlad , a great battle took place in which Sauron ' s forces were destroyed and the Black Gate stormed .

Do S1 & S2 convey the same information?

A: no

Problem: S1: It is part of the Panama City Beach -- Lynn Haven -- Panama City
S2: It is a part of Panama City -- Lynn Haven -- Panama City Beach

Do S1 & S2 convey the same information?

A:
yes