Context: The tour in March 1987[citation needed] of Knuckles, Jefferson, Fingers Inc. (Heard) and Adonis as the DJ International Tour boosted house in the UK. Following the number-one success of MARRS' "Pump Up The Volume" in October, the years 1987 to 1989 also saw UK acts such as The Beatmasters, Krush, Coldcut, Yazz, Bomb The Bass, S-Express, and Italy's Black Box opening the doors to a house music onslaught on the UK charts. Early British house music quickly set itself apart from the original Chicago house sound;[citation needed] many of the early hits were based on sample montage, rap was often used for vocals (far more than in the US),[citation needed] and humor was frequently an important element.

Question: what tour boosted house in the UK in the late 80s?
Answer: Knuckles, Jefferson, Fingers Inc. (Heard) and Adonis as the DJ International Tour

Question: when did the DJ International Tour take place?
Answer: March 1987

Question: what was the name of MARRS' number-one single in October 1987?
Answer: "Pump Up The Volume"

Question: what was frequently an important element of UK house music?
Answer: humor

Question: Sample montages were a key difference between british house music and what?
Answer: the original Chicago house sound

Question: What tour boosted house in the US in the late 80s?
Answer: Unanswerable

Question: When did the Chicago Tour take place?
Answer: Unanswerable

Question: What was the name of MARRS's number-one single in October 1989?
Answer: Unanswerable

Question: What was frequently an important element of US house music?
Answer: Unanswerable

Question: What was not used for vocals?
Answer: Unanswerable