competition stage opponent result scorers
competition
stage
opponent
result
scorers
list length
first second first_list first_length first_list_number first_list_number1 first_list_number2
list length
text text <n,text> <nw, score>(text) <c, text>
1975 afc championship first stage thailand
singapore 2-3 (aet) 0
dolan 2, heydon, porter, wardell
iserief 3, monteath 3, heydon 3, wardell 3, millman
what is the total number of competitions ?
WP VBD-AUX DT JJ NN IN NNS .
21
select count ( distinct c1 ) from w