where:

w	a given source word
A	a set of unique triplets of associated values of w in this context
s	the source word group that w belongs to in this set, aligned with its respective t
t	the target word group that w belongs to in this set, aligned with its respective s
c	the Cross value of all words in group s
P(s,t,c|w)	the probability that w is associated with this source group s, target group t, and Cross value c in this context