name variant name(s) source source coordinates length mouth mouth coordinates
name
variant name -lrb- s -rrb-
source
source coordinates
length
mouth
mouth coordinates
list length
list length
first second first_number second_number
text <c, text> <c, text> text unitnum(unitnum) text text
mouth arroyo salada, sulpher creek, salt creek, canada salada aliso viejo 33°35′39′′n 117°44′22′′w﻿ / ﻿33.5941°n 117.7394°w 2.8 miles (4.5 km) aliso creek beach, laguna beach 33°30′38′′n 117°45′12′′w﻿ / ﻿33.5105°n 117.7532°w
how many different names -lrb- variants not included -rrb- are there ?
WRB JJ JJ NNS -LRB- NNS RB VBN -RRB- VBD-AUX EX .
9
select count ( distinct c1 ) from w