premise: The man is digging in the sand while others watch to see what he discovers.
hypothesis: a man digs to see what he can find.
explanation_1: If he's digging with hopes that he discovers something, he hopes to find soemthing.
explanation_2: Others watch as a man digs to see what he can find.
explanation_3: "To see what he can find" is a rephrasing of "to see what he discovers".
premise_logic: exists e1 p1 x1 x2 x5.(n_male(x2) & n_person(x5) & n_person(x2) & n_sand(x2) & n_man(x1) & exists x3 x4.(exists e3 e2 p2 x6.(n_thing(x6) & Topic(e3,p2) & exists e4.(Actor(e4,x3) & v_see(e4)) & Theme(e3,x6) & Actor(e3,x4) & v_watch(e3) & Theme(e2,x6) & Actor(e2,x2) & v_discover(e2)) & -(x4 = x5) & n_person(x4) & -(x3 = x2) & n_person(x3)) & while(e1,p1) & in(e1,x2) & Actor(e1,x1) & v_dig(e1))
hypothesis_logic: exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_dig(e1) & exists e3 e2 p2 x2.(n_thing(x2) & Theme(e3,x2) & Actor(e3,x1) & v_see(e3) & exists e4.(Theme(e4,x2) & Actor(e4,x1) & v_find(e4)) & Topic(e2,p2) & Actor(e2,x1) & v_can(e2)) & n_male(x1) & n_man(x1))