input: [1] = [2] Creates a filter which requires a field to have a given value. [0] 
output: Equality
options: E q u a l i t y
options: P r e s e n c e
options: S u b s t r i n g
options: P a r e n t h e s e s
options: A n d
options: O r
options: N o t
options: A p p r o x i m a t e
options: G r e a t e r t h a n o r e q u a l t o
options: L e s s t h a n o r e q u a l t o