Problem: S1: They are used in applications as contrast agents for fluorescent imaging , as particles for flow tracking , or as biological carriers .
S2: They are used in applications as contrasting agents for fluorescent imaging , as particles for flow tracking or as biological carriers .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: By then , three-quarters of the slaves had been liberated in Delaware , and a high proportion of slaves in Maryland .
S2: By then , three-quarters of the slaves in Delaware had been freed , and a high proportion of slaves in Maryland .

Do S1 & S2 convey the same information?

A: yes

Problem: S1: Elizabeth Warren is the United States Senator from Massachusetts , a former member of the Republican Party and is currently a member of the Democratic Party .
S2: Elizabeth Warren is the senior United States Senator from Massachusetts , a former member of the Republican Party and currently a member of the Democratic Party .

Do S1 & S2 convey the same information?

A:
yes