premise: Male crowd surfing at a concert.
hypothesis: A man is at a concert.
explanation_1: A male is a man, and crowd surfing at a concert is being at a concert.
explanation_2: " Male " means " man ", so a male at a concert is the same as saying a man is at a concert.
explanation_3: Male  are at concert
premise_logic: exists s1 x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_concert(x3) & n_surfing(x1) & of(x1,x2) & n_crowd(x2) & a_male(s1) & Theme(s1,x1))
hypothesis_logic: exists p1 x1.(exists x2.(at(x1,x2) & n_concert(x2)) & n_man(x1))
premise_sim: exists s1 x1 x2 x3.(of(x1,x2) & n_surfing(x1) & n_crowd(x2) & n_concert(x3) & at(x1,x3) & a_topic(x1) & a_male(s1) & Theme(s1,x1))
hypothesis_sim: exists x1.(n_man(x1) & exists x2.(n_concert(x2) & at(x1,x2)))