Problem: S1: He plays three keyboards , which he uses with a stick attached to the neck of his guitar .
S2: He plays three keyboards , which he uses with a bar attached to the neck of his guitar .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: The first air data patented in the USA was developed in February 1971 by John H. Andresen .
S2: The first air data computer developed in the United States was patented in February 1971 by John H. Andresen .

Do S1 & S2 convey the same information?

A: no

Problem: S1: The '' Houston Chronicle '' is the citywide newspaper , '' Midtown Paper '' is a local newspaper .
S2: The '' Houston Chronicle '' is the citywide newspaper . The '' Midtown Paper '' is a local area newspaper .

Do S1 & S2 convey the same information?

A:
yes