Here are two sentences:

" Smallpox is not the only threat to the public 's health , and vaccination is not the only tool for smallpox preparedness , " Strom said .

" Smallpox is not the only threat to the nation 's health , and vaccination is not the only tool for preparedness , " his introductory statement says .

yes

Here are two sentences:

He later learned that the incident was caused by the Concorde 's sonic boom .

He later found out the alarming incident had been caused by Concorde 's powerful sonic boom .

yes

Here are two sentences:

President Vlad imir Putin threw his weight behind Russia ' s main pro-Kremlin political party for the first time last week , ahead of parliamentary elections .

President Vladimir Putin threw his weight for the first time on Saturday behind Russia 's main pro-Kremlin political party ahead of parliamentary elections .
yes