Turrisipho dalli is a species of sea snail , a marine gastropod mollusk in the family Buccinidae , the true whelks .
Turrisipho dalli is a species of the sea snail , a true gastropod mollusk in the Buccinidae family , the navy whelks .

Are these two sentences paraphrases of each other?
no

There are 7 blue running , 21 red runs , 11 green runs and 4 black runs .
There are 7 blue runs , 21 red runs , 11 green runs , and 4 black runs .

Are these two sentences paraphrases of each other?
yes

Central forces that are conservative can always be expressed as the potential gradient of a negative energy .
Conservative central forces that are conservative can always be expressed as a negative gradient of potential energy :

Are these two sentences paraphrases of each other?
no

At UFC Fight Night 101 , Brown managed to steal a victory against Jon Tuck with a split decision .
During the UFC Fight Night 101 , Brown managed to steal a victory against Jon Tuck with a split decision .

Are these two sentences paraphrases of each other?
yes