One man, wearing his waders in the lake, fly fishing alone.
One man fly fishing on a lake.
One man fly fishing must be alone, and one who is fly fishing in the lake is normally assumed to be wearing waders.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_fishing(x4) & of(x4,x6) & n_fly(x6) & a_,(s1) & Theme(s1,x4) & of(x4,x5) & n_lake(x5) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & in(x3,x4) & r_alone(x4) & n_wader(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_man(x1) & card_eq_1(x1))
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x4) & n_lake(x4) & n_fishing(x1) & of(x1,x3) & n_fly(x3) & of(x1,x2) & n_man(x2) & card_eq_1(x1))