Here are two sentences:

Since last April , scientists have learned how acrylamide is formed .

Scientists are working to determine how exactly how acrylamide is formed in food .

yes

Here are two sentences:

Boeing 's board is also expected to decide at its December meeting whether to offer the airplane for sale to airlines .

It is widely expected to give Bair formal approval to offer the plane for sale to airlines .

no

Here are two sentences:

Powell 's rendition of the third conversation made it more incriminating , by saying an officer ordered that the area be " cleared out . "

Powell 's version made it seem more sinister when he said an officer on the tape ordered that the area be " cleared out . "
yes