FOR D = W1, ..., HAI, WJ, ..., WK, H/AI, ..., WM,EXTRACT FEATURES A...
4. For d = w
1
, ..., hAi, w
j
, ..., w
k
, h/Ai, ..., w
m
,
extract features as x
(1)
,...,x
(m)
.
dm4–k,. . .,dm4+0,. . .,dm4+k: POS4 of k preced-
ing and following words of the word w
i