which swimmers finished in the top 8 for the 2010 commonwealth games - men's 200 metre backstroke event?
james goddard, gareth kean, ashley delaney, christopher walker-hebborn, charles francis, marco loughran, tobias oriwol, ryan bennett
which countries were represented by these swimmers?
england, new zealand, australia, england, canada, wales, canada, england
which of those countries were only represented by one swimmer?
new zealand, australia, wales
which swimmer represented australia?
ashley delaney