Problem: S1: The Turks , Tang , Muslim Arabs , and Tibetans competed for control of Central Asia until the tang 's collapse in the 10th century .
S2: The Turks , Tibetans , Muslim Arabs , and Tang competed for control of Central Asia until the tang 's collapse in the 10th century .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: Higashiura is located in the southern tip of Chita Peninsula in northern Aichi Prefecture .
S2: Higashiura is located in the northern tip of the Chita peninsula in the southern prefecture of Aichi .

Do S1 & S2 convey the same information?

A: no

Problem: S1: The other visa facility does not allow the conversion into free permits or visa - extension .
S2: The visa free facility does not allow the change into other permits or visa extension .

Do S1 & S2 convey the same information?

A:
no