Question: What was the subject of an incident at a sports stadium in Perth, Western Australia?

Related documents: [0]  [DOC] The WACA (formally the WACA Ground) is a sports stadium in Perth, Western Australia. The stadium's name derives from the initials of its owners and operators, the Western Australian Cricket Association. [END] 
[1]  [DOC] The ComBat was an aluminium cricket bat and the subject of an incident that occurred at the WACA cricket ground in Perth in December 1979. [END]  
Answer: ComBat
ComBat