help with index

[BULMADB]

how does index works?
a
b
c
d

i want to capture only c.
the source is json

[evangel]

if it is "c"="...." u can use JSON and type "c" in field name
or if it isnt like that and there is just these 3 word in page,u can use left string as "b" and right string as"d" and if there any space u can replace space with function

[BULMADB]

im using recursive if i turn off capture wrong thing thats why i want to use index

[Ruri]

Index 0 means the first of the captured list, index 1 means the second etc.