question: When did the US begin to experience a growing multiracial identity movement ?
answer: Since the 1980s , the United States has had a growing multiracial identity movement
turker_answer: The US began to experience a growing multiracial identity movement since the 1980 's .
rule-based: The US began to experience a growing multiracial identity movement since the 1980s , the United States has had a growing multiracial identity movement .