Problem: S1: Mike Altman is the director 's son , Robert Altman , and was 14 years old when he wrote the lyrics of the song .
S2: Robert Altman is the son of Mike Altman , director of the original film , and was 14 years old when he wrote the lyrics .

Do S1 & S2 convey the same information?

A: no

Problem: S1: His son Tokugawa Ieyasu was adopted by Naotora and became under Ii Naomasa a dreaded general , who is considered one of his four guards .
S2: His son , Ii Naomasa , was adopted by Naotora and , under Tokugawa Ieyasu , became a dreaded general , who is considered one of his four guardians .

Do S1 & S2 convey the same information?

A: no

Problem: S1: The PRO , which is a '' zero - DP '' , is situated in the subject position of the embedded clause .
S2: The PRO , which is a '' null DP '' is in the subject position of the embedded clause .

Do S1 & S2 convey the same information?

A:
yes