An impromptu toast among friends.
Someone has recently made an achievement.
Toasts are for anything so you cannot assume there was someone who had an achievement.
exists s1 x1 x2.(a_topic(x1) & among(x1,x2) & n_friend(x2) & n_toast(x1) & a_impromptu(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(a_recently(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_achievement(x2) & n_person(x1))