With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: In 1960, Kemp led the Chargers to a Western Division Championship with a 10–4 record. He finished second in the league to Frank Tripucka in passing attempts, completions, and yards (making him and Tripucka the league's first 3,000-yard passers), led the AFL in yards per completion and times sacked, and finished one rushing touchdown short of the league lead. Under Kemp, the Chargers' offense averaged 46 ;points over its last four games and scored more than 41 ;points in five of its last nine games. In the AFL championship game, he led the team to field goals on its first two possessions, and since the Houston Oilers never posted a touchdown in the second quarter for a 7–6 lead, the Chargers recovered.
text_B: Do the Chargers have an AFL Championship trophy in their trophy case?
YES.