Extract grammar and look for suspicious rules

[nschneid]

Showing rules with only Heads on the RHS:

Legit:

172 AdjP -> Head:Adj
 14 AdjP -> Head:AdjP
132 AdvP -> Head:Adv
502 Clause -> Head:VP
114 Clause -> Head:Clause
 10 Clause -> Head:Coordination
  2 Clause -> Head:GAP
 93 Coordination ->
  3 Coordination -> Head:Coordination
307 DP -> Head:D
 30 Flat ->
  6 MultiSentence ->
801 NP -> Head:Nom
 43 NP -> Det-Head:DP Head:Nom
 35 NP -> Head:NP
  8 NP -> Head:Coordination
  1 NP -> Marker-Head:Coordinator Head:Nom
  1 NP+AdjP ->
  1 NP+Clause ->
  1 NP+Clause -> Head:NP+Clause
  4 NP+PP ->
  2 NP+PP -> Head:NP+PP
622 Nom -> Head:N
265 Nom -> Head:Nom
252 Nom -> Head:N_pro
 29 Nom -> Head:Flat
 13 Nom ->
 13 Nom -> Det-Head:DP
  3 Nom -> Det-Head:D
  1 Nom -> Mod-Head:AdjP Head:Nom
  1 Nom -> Mod-Head:PP Head:Nom
  1 Nom -> Mod-Head:VP Head:Nom
326 PP -> Head:P
 11 PP -> Head:PP
127 ROOT -> Clause
 17 ROOT -> Coordination
 11 ROOT -> NP
  6 ROOT -> MultiSentence
  1 ROOT -> AdjP
  1 ROOT -> Nom
  1 ROOT -> VP
  3 V -> Head:V
349 VP -> Head:V
213 VP -> Head:V_aux
172 VP -> Head:VP
 12 VP -> Head:GAP
  8 VP -> Head:Coordination

Need investigation:

  5 Clause ->
  1 Clause -> Head:V
 26 Clause_rel -> Head:Clause
 21 Clause_rel -> Head:VP
  3 Clause_rel -> Head-Prenucleus:NP Head:Clause
  1 Clause_rel -> Head-Subject:NP Head:VP
  1 DP -> Head:Flat
  2 NP -> Det-Head:DP
  1 NP -> Det-Head:DP Head:GAP
  1 NP -> Det-Head:NP Head:Nom
  1 NP -> Head-Prenucleus:NP Head:Nom
  1 NP -> Head:GAP
  1 NP -> Head:VP
  3 Nom -> Head:NP
  1 Nom -> Head:PP
  1 VP ->
  1 VP -> Head:Clause
  1 VP -> Head:V Head:Coordination
  1 VP -> Head:V Head:VP

Eliminated with fixes:

NP -> Head:N_pro
NP -> Head:N
DP -> Head:N_pro
NP ->
AdvP -> Head:P
NP -> Head:Nom Head:VP
Nom -> Head:Adj