You are given a math word problem and you are supposed to apply an addition mathematical operator on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: Winter is almost here and most animals are migrating to warmer countries. There are 18 bird families living near the mountain. If 38 bird families flew away to africa and 80 bird families flew away to asia 

 Question: How many bird families flew away for the winter?
118