Curiously , among the many dozens of buildings pictured in de Botton 's book , the one that crops up most frequently is a house that the philosopher Ludwig Wittgenstein designed for his sister in Vienna .
Ludwig Wittgenstein /people/person/place_lived Vienna
RB , IN DT JJ NNS IN NNS VBN IN FW FW POS NN , DT CD WDT NNS IN JJS RB VBZ DT NN IN DT NN NNP NNP VBN IN PRP$ NN IN NNP .
Ludwig Wittgenstein
PERSON
Vienna
LOCATION
/people/person/place_lived