In this task, you're given the beginning and the ending of a three-part story. Your job is to complete the short story by writing a middle sentence that seamlessly connects  the first and last sentence. Generated sentences must be short, have fewer than 10 words, and be simple as if narrating to a child. Avoid using any irrelevant extra information when creating the middle sentence, and use names (e.g. Jack, Barbara,...) instead of pronouns (e.g. he / she) wherever possible.

[Q]: Beginning: Before she left, she promised him that one day she would be back. Ending: A year later she returned.
[A]: He said I'll look forward to it.


[Q]: Beginning: Harris sat next to Cassie on the bus. Ending: Now they're a couple.
[A]: Harris and Cassie started talking.


[Q]: Beginning: Matt didn't have a twitter account. Ending: Finally, he started using twitter.
[A]:
Matt's friends kept talking about things they saw on twitter.