Allow Hansard parser to recognise 'Chambers' as well as 'Chamber'
Allow Hansard parser to recognise 'Chambers' as well as 'Chamber'

To prevent it skipping Hansards where the venue is written as
"Senate Chambers" rather than the more usual "Senate Chamber"

patricmutwiri/pombola,ken-muturi/pombola,geoffkilpin/pombola,ken-muturi/pombola,mysociety/pombola,ken-muturi/pombola,patricmutwiri/pombola,ken-muturi/pombola,patricmutwiri/pombola,mysociety/pombola,ken-muturi/pombola,geoffkilpin/pombola,geoffkilpin/pombola,ken-muturi/pombola,mysociety/pombola,mysociety/pombola,geoffkilpin/pombola,mysociety/pombola,geoffkilpin/pombola,mysociety/pombola,patricmutwiri/pombola,geoffkilpin/pombola,patricmutwiri/pombola,patricmutwiri/pombola