@keywords is, of, a.

@prefix log: <http://www.w3.org/2000/10/swap/log#> .
@prefix math: <http://www.w3.org/2000/10/swap/math#> .
@prefix : <deadbeat#> .

# deadbeat dad law
{?X a :Person. 
?X :OutstandingObligation ?ChildSupport.
?ChildSupport a  :ChildSupportOutstandingObligation.
?ChildSupport :value ?Amt.
?Amt math:greaterThan 1000}  
=> 
{?X a :DeadbeatDad}.

# some data
Joe a :Person.
Joe :OutstandingObligation :05-CIV-NY-223. 
:05-CIV-NY-223 a :ChildSupportOutstandingObligation.
:05-CIV-NY-223 :value 1500.


# some data
Harry a :Person.
Harry :OutstandingObligation :05-CIV-NY-224. 
:05-CIV-NY-224 a :ChildSupportOutstandingObligation.
:05-CIV-NY-224 :value 900.