Definition: 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.
Input: Sentence1: I donated to a charity for three years. Sentence2: One day, I decided to research them more in depth. Sentence3: I learned that 50 percent of all donations were paid to the CEO! Sentence4: I became furious and sent a letter of complaint to the CEO.

He didn't reply so I decided to stop donating to the charity.