In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.

Example Input: Sentence1: Brandon was given a 10 page research paper to write for class. Sentence2: He begun working on the paper on his 2003 Dell laptop. Sentence3: Brandon stayed up until 1 in the morning to try and finish his paper. Sentence4: Suddenly, his computer crashed and died.
Example Output: Luckily he had been saving everything on an external disk.

Example Input: Sentence1: All Ellie wanted to do was surf. Sentence2: Ellie's mom wanted her to study harder, and graduate from high school. Sentence3: Instead, Ellie went to the beach and surfed for hours. Sentence4: Ellie found out she wouldn't be able to graduate with her friends.
Example Output: She took a summer school class, and graduated the very next fall.

Example Input: Sentence1: Mike was digging up his yard to plant a garden. Sentence2: His shovel went into the earth then suddenly stopped. Sentence3: He dug around the obstruction to see it. Sentence4: It was a human skull.
Example Output:
He tossed the skull far away and kept digging.