there is an factor
there
is
an
Factor is a descriptor.
The there is an operator evaluates to true if a variant with the given descriptor exists, or false if no variant with the given descriptor exists.
there is an
true
variant
false
there is a, there's a, there's an
there is a
there's a
there's an
there is not a, there is not an
there is not a
there is not an