Problem: S1: Since 2009 , no highly significant agonists or antagonists have been discovered for the M receptor , but several non-selective Muscarian agonists and antagonists have selective affinity for M .
S2: No highly significant agonists or antagonists for the M receptor have been discovered as of 2009 , but several non-selective muscarinic agonists and antagonists have selective affinity for M .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: Spain , Germany and the Netherlands have agreed to develop a trilateral basic draft , which should be built by each nation itself and finally developed .
S2: Spain , Germany and the Netherlands agreed to develop a trilateral basic design , which should be developed and finally built by each nation by itself .

Do S1 & S2 convey the same information?

A: no

Problem: S1: Hucknall Town was a railway station on the Great Northern Railway from Nottingham to Shirebrook .
S2: Hucknall Town was a railway station on the Shirebrook to Nottingham - line of the Great Northern Railway .

Do S1 & S2 convey the same information?

A:
no