On April 1 , 2011 , West Africa - Democracy - Radio ( WADR ) launched a news platform that involved Airtime .
West Africa Democracy Radio ( WADR ) launched a news platform that incorporated Airtime on April 1 , 2011 .

Are these two sentences paraphrases of each other?
yes

In 2006 , Goldman Sachs sold the company to Silverlake Partners for US $ 800 million .
Goldman Sachs sold the company to Silverlake Partners in 2006 for $ 800 million .

Are these two sentences paraphrases of each other?
yes

The Jecnova River is a tributary of the River MureA in Romania .
The MureA River is a tributary of the River Jecnova in Romania .

Are these two sentences paraphrases of each other?
no

The formation of aggregates is influenced by electrostatic interactions , coordination between lithium and surrounding solvent molecules or steric additives , as well as polar effects .
Formation of aggregates is influenced by electrostatic interactions , the coordination between lithium and surrounding solvent molecules or polar additives , and steric effects .

Are these two sentences paraphrases of each other?
no