With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The 1992 Los Angeles riots occurred in the most populous county in the United States in 1992.
text_B: The 1973 PGA Tour season was played from January 4 to December 1 .. PGA Tour. PGA Tour. The season consisted of 48 official money events .. Jack Nicklaus won the most tournaments , seven , and there were seven first-time winners .. Jack Nicklaus. Jack Nicklaus. The tournament results and award winners are listed below .
not_related.