The rules that use the vocabulary item "bm21" are:

<i_f_v-sing>

bm21 mlrs

bm21 mrl

mlrs bm21

mrl bm21

swa bm21

<i_f_v-pl>

bm21 mlrses

bm21 mrls

<i_f_v>

bm21 mlrs

bm21 mlrses

bm21 mrl

bm21 mrls

mlrs bm21

mrl bm21

swa bm21