Here are two sentences:

Of 456 women who had experienced stress , 24 ( 5.3 % ) had developed breast cancer .

Of the unstressed women , 23 developed breast cancer and 871 did not .

no

Here are two sentences:

The CFTC has been investigating several energy companies , including at least three Colorado companies , for manipulating energy markets by reporting false natural-gas trading prices to industry publications .

The federal agency has been investigating whether several energy companies manipulated energy markets by reporting false natural gas trading prices to industry publications .

yes

Here are two sentences:

" The accusation that I misappropriated money from Jennifer Lopez is both untrue and offensive , " Medina said in a statement .

In response , Medina issued the following statement : " The accusation that I misappropriated money from Jennifer Lopez is both untrue and offensive .
yes