Mike McCoy was the coach of the Aviators and Carl Caldwell was the General Manager .
Carl Caldwell was the head coach of the Aviators , and Mike McCoy was the General Manager .

Are these two sentences paraphrases of each other?
no

The position of the opposition leader was essentially informal throughout the nineteenth century , with formal recognition only being granted in the early twentieth century .
The position of Leader of the Opposition was essentially informal throughout the nineteenth century , with formal recognition only being granted in the early twentieth century .

Are these two sentences paraphrases of each other?
yes

The river Geamartalui is a tributary of the Stramba River in Romania .
The Stramba River is a tributary of the Geamartalui River in Romania .

Are these two sentences paraphrases of each other?
no

In November , the Royals acquired CF Coco Crisp from the Boston Red Sox in exchange for RP Ramon Ramirez .
In November , the Royals CF Coco Crisp acquired the Boston Red Sox in return for RP Ramon Ramirez .

Are these two sentences paraphrases of each other?
yes