Sentence 1: With a deadline fast approaching, Kristen had to get down to work. 
 Sentence 3: In an attempt to clear it up, she took her dog for a walk in the park 
 Sentence 4:  As she strolled she could feel her mind clear and relax 
 Sentence 5:  Upon returning home she was able to complete her paper in record time 
 Given Sentence 2: However, she had a serious case of writer's block.