no. name took office left office president served under notable for
no .
name
took office
left office
president served under
notable for
number
number parsed year month day
number parsed year month day
list length
number text date date <c, text> text
1 harvey washington wiley, m.d january 1, 1907 march 15, 1912 theodore roosevelt, william howard taft chemist; advocacy of the passage of the pure food and drug act in 1906; subsequent work at good housekeeping institute laboratories
how many commissioners have there been ?
WRB JJ NNS VBD-AUX RB VBD-AUX .
21
select count ( distinct c1 ) from w