source: [tag=NNS | lemma=","] [lemma=while] □ □
destination: [tag=NNS | lemma=","] [lemma=while] [□] □
spec: the type that you need to steer around if you are in an icebreaker . Residents younger than 20 years old in all areas experienced violent crime more than all other age groups , while residents age 65 or over experienced violent crime the least of all age groups .