claim: Levoamphetamine is a stimulant.
evidence: Claassen or Claassens is a Afrikaans , Dutch and Low German patronymic surname .. Afrikaans. Afrikaans. Dutch. Dutch language. Low German. Low German. patronymic surname. patronymic surname. It may refer to  :. Arthur Claassen -LRB- 1859 -- 1920 -RRB- , German orchestral conductor. Arthur Claassen. Arthur Claassen. Ben Claassen III -LRB- born 1977 -RRB- , American comics artist and illustrator. Ben Claassen III. Ben Claassen III. -LRB- born 1969 -RRB- , Dutch jazz singer. Dutch. Dutch language. George Claassen -LRB- born ca. 1950 -RRB- , South African writer , brother of Wynand. George Claassen. George Claassen. J. G. Claassen -LRB- born 1991 -RRB- , South African golfer. J. G. Claassen. J. G. Claassen. Neil Claassen -LRB- born 1992 -RRB- , South African rugby player. Neil Claassen. Neil Claassen. Peter Walter Claassen -LRB- 1886 -- 1937 -RRB- , American entomologist. Peter Walter Claassen. Peter Walter Claassen. Claasenia , a genus of stoneflies , Claassen 's skolly , a butterfly. Claasenia. Perlidae. Ruben Claassen -LRB- born 1993 -RRB- , South African cricketer. Ruben Claassen. Ruben Claassen. -LRB- born 1964 -RRB- , Dutch sculptor. Dutch. Dutch language. Utz Claassen -LRB- born 1963 -RRB- , German manager. Utz Claassen. Utz Claassen. Wynand Claassen -LRB- born 1951 -RRB- , South African rugby player , brother of George. Wynand Claassen. Wynand Claassen. Claassens. Errie Claassens -LRB- born 1981 -RRB- , South African rugby player. Errie Claassens. Errie Claassens. Michael Claassens -LRB- born 1982 -RRB- , South African rugby player. Michael Claassens. Michael Claassens