The West City line is the border of Steuben County , and the southern town line is the border of Ontario County .
The west town line is the border of Ontario County , and the south town line is the border of Steuben County .

Are these two sentences paraphrases of each other?
no

Since 2003 , Sharon Northe has been the head of the group , since 2017 Heather Weaver has been President .
Sharon Northe has been the conductor of the group since 2003 , and Heather Weaver has been President since 2017 .

Are these two sentences paraphrases of each other?
yes

The SAS curve ( Surprise Aggregate Supply ) is a vertical line called the EAS curve ( Equilibrium Long Supply ) in the course of the aggregate .
The SAS ( Surprise aggregate supply ) curve is in the aggregate run a vertical line called the EAS ( Equilibrium long Supply ) curve .

Are these two sentences paraphrases of each other?
yes

As playing fields nearer the school were developed , Fender Field was later sold .
When playing fields were sold nearer the school , Fender Field was later developed .

Are these two sentences paraphrases of each other?
no