Task: Question Answering
Input (English): Context: I saw a hummingbird , a female , I think , so I sat on the front porch to watch her and her mate take turns running patrol and eating . When I went to leave there were 4 birds . I think they were fighting over the feeders . That or it was two parents with babies about to leave the nest . 
Question: What is the reason the hummingbirds were running patrol ?
Output (English): They had a nest with babies.