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