 
<translate> Ahịrịokwu dị mkpa n'amaokwu ahụ bụ: A na-eme asọmpi ahụ kwa afọ anọ kemgbe 1991, mgbe asọmpi mmeghe, nke a na-akpọ FIFA Women's World Championship, na China. Ya mere, azịza ya bụ 1991. <eng> The relevant sentence in the passage is: The competition has been held every four years since 1991, when the inaugural tournament, then called the FIFA Women's World Championship, was held in China. So, the answer is 1991. 