premise: A man in a dark shirt and overalls is squatting down on gravel and working on a railroad car.
hypothesis: A man dressed in a dark shirt with overalls is squatting down on gravel as he works on a railroad care.
explanation_1: Working is a rephrasing of works
explanation_2: Sentence 2 is simply a rephrasing of the working man in the shirt described in sentence 1.
explanation_3: working on a railroad car is inferred as works on a railroad care and man in a dark shirt and overalls is inferred as  man dressed in a dark shirt with overalls
premise_logic: exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11.(on(e2,x10) & n_car(x10) & of(x10,x11) & n_railroad(x11) & Actor(e2,x6) & v_work(e2) & in(x6,x7) & subset_of(x9,x7) & n_overalls(x9) & subset_of(x8,x7) & n_shirt(x8) & a_dark(s3) & Theme(s3,x8) & n_man(x6) & a_down(s2) & Manner(e1,s2) & on(e1,x5) & n_gravel(x5) & Actor(e1,x1) & v_squat(e1) & in(x1,x2) & subset_of(x4,x2) & n_overalls(x4) & subset_of(x3,x2) & n_shirt(x3) & a_dark(s1) & Theme(s1,x3) & n_man(x1))
hypothesis_logic: exists e1 e2 p1 s1 s2 x1 x2 x3 x4 x5.(exists e3 x6 x7.(on(e3,x6) & n_care(x6) & of(x6,x7) & n_railroad(x7) & Actor(e3,x1) & v_work(e3)) & n_male(x1) & as(e2,p1) & a_down(s2) & Manner(e2,s2) & on(e2,x5) & n_gravel(x5) & Actor(e2,x1) & v_squat(e2) & in(e1,x3) & with(x3,x4) & n_overalls(x4) & n_shirt(x3) & a_dark(s1) & Theme(s1,x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_man(x1))