Sentence 1: George decided to build a cat tree one day for his many cats. 
 Sentence 3: George's wife Lucille decided to help George with the cat tree 
 Sentence 4:  She did some online research about cat trees 
 Sentence 5:  The next week their new cat tree arrived in the mail 
 Given Sentence 2: After two weeks the cat tree was still unfinished.