premise: A man operates a piece of earth-moving equipment near a waterway.
hypothesis: A man is operating a machine
explanation_1: A man operating a machine leaves out type of equipment and place mentioned in first sentence.  Shorter way to say basic sentence.
explanation_2: Earth-moving equipment is a machine.
explanation_3: He is operating a machine because he operates equipment.
premise_logic: exists e1 s1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & near(x2,x4) & n_waterway(x4) & of(x2,x3) & n_equipment(x3) & a_earth-moving(s1) & Theme(s1,x3) & n_piece(x2) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_machine(x2) & n_man(x1))