Sentence 1: Mark was an American spy during the Cold War. 
 Sentence 3: At night, he snuck up to the hidden building 
 Sentence 4:  A guard heard him, but did not see him sneaking inside 
 Sentence 5:  Mark stole the document and escaped easily 
 Option 1: He was told to steal a document from the Russians in Berlin. 
 Option 2: He was told to buy a document from the Russians in Berlin.