question: What are the names of the two native birds in Guam before the brown snake intrusion ?
answer: Guam rail ( or ko ` ko ' bird in Chamorro ) and the Guam flycatcher
turker_answer: Guam rail ( or ko ` ko ' bird in Chamorro ) and the Guam flycatcher were two native birds in Guam before the brown snake intrusion .
rule-based: The names of the two native birds in Guam before the brown snake intrusion are Guam rail ( or ko ` ko ' bird in Chamorro ) and the Guam flycatcher .