sentence: Also , computers can break down , and then a human is needed to take control - such as an airline pilot - and there are still certain tasks only a human being can perform , and they are often among the simplest .
modified: Also , computers can break down , and then a human is needed to take control - such as an airline pilot , and there are still certain tasks only a human being can perform , and they are often among the simplest .
transformation: PUNCT