Sentence 1: Sandra had to sign an important document at work but he lost her pen. 
 Sentence 3: Sandra went to her co-worker to ask for a pen 
 Sentence 4:  He dug in his desk and found a green and a blue pen 
 Sentence 5:  Sandra took the blue pen and signed the document again 
 Given Sentence 2: She tried to write it in pencil but her boss would not accept it.