Problem: S1: This new heavier isotope can be stable or unstable ( radioactive ) depending on the chemical element involved .
S2: This new heavier isotope may be stable or unstable depending on the chemical element ( radioactive ) .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: Sol Lesser , a film producer who had discovered Jackie Coogan , signed Breen at RKO Radio Pictures .
S2: Sol Lesser , a film producer who had discovered Breen , signed Jackie Coogan at RKO Radio Pictures .

Do S1 & S2 convey the same information?

A: no

Problem: S1: This painting expresses the personal tragedy of Paul Moran and the loss of his cameraman , Eric Campbell , who was the first Australian to die in the Iraq War .
S2: This painting expresses the personal tragedy of Paul Moran and the loss of his cameraman Eric Campbell , who was the first Australian to die in the war in Iraq .

Do S1 & S2 convey the same information?

A:
yes