A man in a yellow and red shirt is operating machinery.
A man is operating machinery.
A man is operating machinery is a generalized form of a man in a yellow and red shirt is operating machinery.
exists p1 s1 s2 x1 x2.(exists e1 x3.((x1 = x3) & n_machinery(x3) & Actor(e1,x3) & v_operate(e1)) & in(x1,x2) & n_shirt(x2) & a_red(s2) & Theme(s2,x2) & a_yellow(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1.(exists e1 x2.((x1 = x2) & n_machinery(x2) & Actor(e1,x2) & v_operate(e1)) & n_man(x1))