module Tnql
  grammar VitalStatus
    rule dead_or_alive
      space vital_status:('dead' / 'alive') word_break <Nodes::DeadOrAliveNode>
    end

    rule death_certificate
      have_keyword space modifier:('no' / 'a') death_certificate_keywords <Nodes::DeathCertificateNode>
    end

    rule death_certificate_keywords
      space 'death' space 'certificate' word_break
    end

    rule have_keyword
      space 'have' word_break
    end
  end
end