A man in a red coat skiing.
A man in a red coat snowboards.
A man can't be skiing or snowboarding at the same time.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_skiing(x2) & of(x2,x3) & n_coat(x3) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_snowboard(x2) & of(x2,x3) & n_coat(x3) & a_red(s1) & Theme(s1,x2) & n_man(x1))