premise: A man in a blue t-shirt is taking a picture while a woman with an umbrella walks behind him.
hypothesis: There is a dog doing the moonwalk in the background.
explanation_1: It is not possible to see a blue t-shirt under the moon
explanation_2: The subject is either a dog or a man in a blue t-shirt.
explanation_3: A man or woman is not a dog.
premise_logic: exists e1 p1 s1 x1 x2 x3.(exists e2 x4 x5.(behind(e2,x1) & Actor(e2,x4) & v_walk(e2) & with(x4,x5) & n_umbrella(x5) & n_woman(x4)) & n_male(x1) & while(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_take(e1) & n_picture(x3) & in(x1,x2) & n_t-shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
hypothesis_logic: exists p1 x1 x4 x5.(n_background(x5) & n_moonwalk(x4) & exists e1 x2 x3.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & in(x4,x5) & (x2 = x3) & n_dog(x2)))