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

<point_id-entry_point>

brown

<point_id-craft_landing_zone>

brown

<point_id-checkpoint>

brown

<point_id>

brown

<point_id-waypoint>

brown

<color>

brown

<point_id-cap>

brown

<point_id-point_id_type_none>

brown

<point_id-debark_point>

brown

<point_id-embark_point>

brown

<point_id-bullseye>

brown

<point_id-coordination_point>

brown

<point_id-base_of_fire>

brown

<point_id-initial_point>

brown

<point_id-holding_point>

brown

<point_id-landing_zone>

brown

<point_id-homebase>

brown