#!/usr/local/bin/ruby
x=[]
x<<'I ([go to]|[like]|[watch]) ([Tokyo]|[sushi]) in London.'
x<<'[Go to] home'
x<<'([My sun]|[Brother of his father]) ([in the city]|[there]|[over there]) is ([running]|[cute])'

p x[0].scan(/\(.*?\)/)
p x[1].scan(/\(.*?\)/)
p x[2].scan(/\(.*?\)/)