Sentence 1: Emily was reading a book about Vikings. 
 Sentence 3: It appeared to have two horns on its head 
 Sentence 4:  Emily's mind raced and she hid under the covers 
 Sentence 5:  It was actually just the floor lamp in the living room 
 Option 1: She then noticed some shadow at the door. 
 Option 2: She then noticed her father at the door.