# data[].attributes.body
Givens two set A and B ,with B subset of A  ,the complementary set of B respect to A  is A-B.

# data[].attributes.body
There are OP for set:

# data[].attributes.body
There are 3 methods:
TABULAR FORM

# data[].attributes.body
A set is usally denoted by capital letters,A,B,C,...
The elements in the set can be in the set (BELONG TO) or (DOESN'T BELONG TO)