Problem: S1: A screw-shaped camshaft is a type of variable mechanical valve actuation system ( VVA ) .
S2: A helical camshaft is a type of mechanical variable valve actuation ( VVA ) system .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: '' Lonely Journey '' and '' Lullaby '' have been used in several music collections in arranged versions sung by Hironobu Kageyama .
S2: '' Lonely Journey '' and '' Lullaby '' have been sung in several music collections in arranged versions of Hironobu Kageyama .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: The returning Isaac Fontaine , who last played with Sta.Lucia three years ago , replaces Carrawell .
S2: The returning Carrawell , who played with Sta.Lucia for the last time three years ago , replaces Isaac Fontaine .

Do S1 & S2 convey the same information?

A:
no