The rules that use the category "<discourse_det-not_wh_or_dummy-sing>" are:

<np-gapsout_null-gapsin_null-unit-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-unit>

<np-gapsout_null-gapsin_null-unit-not_wh_or_dummy>

<discourse_det-not_wh_or_dummy-sing> <n-sing-unit>

<np-gapsout_null-gapsin_null-line_loc-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-line_loc>

<np-gapsout_null-gapsin_null-kind-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-kind>

<np-gapsout_null-gapsin_null-np_type_null-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-np_type_null>

<np-gapsout_null-gapsin_null-scale_number-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-scale_number>

<np-gapsout_null-gapsin_null-compass_direction-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-compass_direction>

<np-gapsout_null-gapsin_null-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing>

<np-gapsout_null-gapsin_null-line_loc-not_wh_or_dummy>

<discourse_det-not_wh_or_dummy-sing> <n-sing-line_loc>

<np-gapsout_null-gapsin_null-orientation-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-orientation>

<np-gapsout_null-gapsin_null-point_loc-not_wh_or_dummy-sing>

<discourse_det-not_wh_or_dummy-sing> <n-sing-point_loc>

<np-gapsout_null-gapsin_null-point_loc-not_wh_or_dummy>

<discourse_det-not_wh_or_dummy-sing> <n-sing-point_loc>

<np-gapsout_null-gapsin_null-not_wh_or_dummy>

<discourse_det-not_wh_or_dummy-sing> <n-sing>