Context: However, from 1971 to 1975, NBA teams played preseason exhibitions against American Basketball Association teams. In the early days of the NBA, league clubs sometimes challenged the legendary barnstorming Harlem Globetrotters, with mixed success. The NBA has played preseason games in Europe and Asia. In the 2006 and 2007 seasons, the NBA and the primary European club competition, the Euroleague, conducted a preseason tournament featuring two NBA teams and the finalists from that year's Euroleague.[citation needed] In the 1998-99 and 2011-12 seasons, teams were limited to only two preseason games due to lockouts.

Question: When did the NBA play preseason games against the ABA?
Answer: 1971 to 1975

Question: What legendary team did the NBA sometimes formerly play against?
Answer: Harlem Globetrotters

Question: On what continents have NBA teams played preseason games outside the US?
Answer: Europe and Asia

Question: How many preseason games were NBA teams limited to in the 2011-12 season?
Answer: two

Question: What is the main European basketball club?
Answer: the Euroleague

Question: When did the NBA play postseason games against the ABA?
Answer: Unanswerable

Question: What legendary team does the NBA still play against?
Answer: Unanswerable

Question: What two continents has the NBA never played a preseason gaming?
Answer: Unanswerable

Question: In what two seasons the teams have unlimited preseason games due to lockouts?
Answer: Unanswerable

Question: What two seasons in the NBA not playing Europe and Asia?
Answer: Unanswerable