A man and boy play in the sand.
A boy and a man play in the sand.
' A man and boy play' is a rephrasing of '  A boy and man play
exists s1 x1 x2 x3 x4.(n_sand(x4) & a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_play(x2) & of(x2,x3) & n_boy(x3) & subset_of(x1,s1) & n_man(x1))
exists s1 x1 x2 x3 x4.(n_sand(x4) & a_topic(s1) & subset_of(x2,s1) & in(x2,x4) & n_play(x2) & of(x2,x3) & n_man(x3) & subset_of(x1,s1) & n_boy(x1))