The rules that use the category "<line_mod-gapsout_null-gapsin_null>" are:

<line_loc-gapsout_null-gapsin_null>

<line_loc-gapsout_null-gapsin_null> <line_mod-gapsout_null-gapsin_null>

<line_loc-gapsout_np_gap-gapsin_np_gap>

<line_loc-gapsout_null-gapsin_null> <line_mod-gapsout_null-gapsin_null>

<locate_line-gapsout_null-gapsin_null>

<locate_line-gapsout_null-gapsin_null> <line_mod-gapsout_null-gapsin_null>

<line_loc-gapsout_pp_gap-gapsin_pp_gap>

<line_loc-gapsout_null-gapsin_null> <line_mod-gapsout_null-gapsin_null>

<postnommod-line_loc>

<line_mod-gapsout_null-gapsin_null>