Problem: Determine the topic of the passage. "Motorcycle speedway, usually referred to as speedway, is a motorcycle sport involving four and sometimes up to six riders competing over four anti-clockwise laps of an oval circuit." Topic:

A: Motorcycle speedway


Problem: Determine the topic of the passage. "A furlong is a measure of distance in imperial units and U.S. customary units equal to one-eighth of a mile , equivalent to 220 yards , 660 feet , 40 rods , or 10 chains ." Topic:

A: Furlong


Problem: Determine the topic of the passage. "Hogwarts School of Witchcraft and Wizardry, shortened Hogwarts, is a fictional British school of magic for students aged eleven to eighteen, and is the primary setting for the first six books in J.K. Rowling 's Harry Potter series." Topic:

A: Hogwarts


Problem: Determine the topic of the passage. "LSD is non-addictive, is not known to cause brain damage, and has extremely low toxicity relative to dose ." Topic:

A:
Lysergic acid diethylamide