premise: A person with a striped tube standing in the middle of a crowd of people.
hypothesis: A human is surrounded.
explanation_1: A person is surrounded by a crowd.
explanation_2: To be surrounded and to be in a crowd of people are the same thing.
explanation_3: The person is in the "middle of a crowd of people" which means he is a human, and another word for being "in the middle of a crowd" is being surrounded.
premise_logic: exists s1 x1 x2 x3 x4 x5 x6.(n_middle(x4) & a_topic(x1) & with(x1,x2) & in(x2,x4) & of(x4,x5) & of(x5,x6) & n_people(x6) & n_crowd(x5) & n_standing(x2) & of(x2,x3) & n_tube(x3) & a_striped(s1) & Theme(s1,x2) & n_person(x1))
hypothesis_logic: exists e1 x1.(Theme(e1,x1) & v_surround(e1) & n_human(x1))
premise_sim: exists s1 x1 x2 x3 x4 x5 x6.(with(x1,x2) & of(x5,x6) & of(x4,x5) & of(x2,x3) & n_tube(x3) & n_standing(x2) & n_person(x1) & n_people(x6) & n_middle(x4) & n_crowd(x5) & in(x2,x4) & a_topic(x1) & a_striped(s1) & Theme(s1,x2))
hypothesis_sim: exists e1 x1.(v_surround(e1) & n_human(x1) & Theme(e1,x1))