A man in a fishing vest and rubber boots is talking to a vendor.
A woman sips her coffee alone.
There is a man and a vendor, not just one woman. The man is not sipping coffe, he is talking. The man can't be alone, he is talking to a vendor.
exists e1 x1 x2 x3 x4 x5 x6 x7.(to(e1,x7) & n_vendor(x7) & Actor(e1,x1) & v_talk(e1) & in(x1,x2) & n_boot(x4) & of(x4,x6) & n_rubber(x6) & n_vest(x3) & of(x3,x5) & n_fishing(x5) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sip(e1) & r_alone(x2) & n_coffee(x2) & of(x2,x1) & n_female(x1) & n_woman(x1))