[tag=VBZ] [lemma=only] [□=□] □
[tag=VBZ] [lemma=only] [tag=□] □
[tag=VBZ] [lemma=only] [lemma=□] □
Make sure that all sentences that are recognised by your modified grammar are grammatically correct , i.e. that ' buys ' instead of ' buy ' is only used where appropriate etc. Also make sure that ' of ' is only used after ' dozens ' or ' halfdozens ' - not after numbers of dozens .