Sentence 1: Stu tore his sisters penguin plushie while arguing with her. 
 Sentence 3: Stu immediately regretted his action 
 Sentence 4:  Stu found and purchased many bird plushies 
 Sentence 5:  When he them to his sister, she forgot about the penguin completely 
 Given Sentence 2: After his first day, he asked if he could walk home with her.