source: [tag=□] □ □ □
destination: [tag=VBZ] □ □ □
spec: The Choose ( n ) is a pool wherein the bettor is required to select any ( n ) winning horses from that particular group of races and is not a parlay . 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 .