diff --git a/packages/CLPBN/examples/City/db_128.yap b/packages/CLPBN/examples/City/db_128.yap
new file mode 100644
index 000000000..6eea3954a
--- /dev/null
+++ b/packages/CLPBN/examples/City/db_128.yap
@@ -0,0 +1,25 @@
+
+%conservative_city(nyc, t).
+
+hair_color(joe, t).
+
+car_color(joe, t).
+
+shoe_size(joe, f).
+
+/* Steps:
+
+1. generate N facts lives(I, nyc), 0 <= I < N.
+
+2. generate evidence on descn for N people, *** except for 1 ***
+
+3. Run query ?- guilty(joe, Guilty), witness(joe, t), descn(2,t), descn(3, f), descn(4, f).
+
+query(Guilty) :-
+    guilty(joe, Guilty), 
+    witness(joe, t),
+    descn(2,t),
+    descn(3,f), 
+    descn(4,f), ....
+
+*/
\ No newline at end of file
diff --git a/packages/CLPBN/examples/City/schema.yap b/packages/CLPBN/examples/City/schema.yap
new file mode 100644
index 000000000..ff1950b40
--- /dev/null
+++ b/packages/CLPBN/examples/City/schema.yap
@@ -0,0 +1,60 @@
+
+/* base file for school database. Supposed to be called from school_*.yap */
+
+conservative_city(City, Cons) :-
+	cons_table(City, ConsDist),
+	{ Cons = cons(City) with p([y,n], ConsDist)   }.
+
+gender(X, Gender) :-
+	gender_table(City, GenderDist),
+	{ Gender = gender(City) with p([m,f], GenderDist)   }.
+
+hair_color(X, Color) :-
+	lives(X, City),
+	conservative_city(City, Cons),
+	gender(X, Gender),
+	color_table(X,ColorTable),
+	{ Color = color(X) with
+		p([t,f], ColorTable,[Gender,Cons]) }.
+
+car_color(X, Color) :-
+	hair_color(City, HColor),
+	ccolor_table(X,CColorTable),
+	{ Color = ccolor(X) with
+		p([t,f], CColorTable,[HColor]) }.
+
+height(X, Height) :-
+	gender(X, Gender),
+	height_table(X,HeightTable),
+	{ Height = height(X) with
+		p([t,f], HeightTable,[Gender]) }.
+
+shoe_size(X, Shoesize) :-
+	height(X, Height),
+	shoe_size_table(X,ShoesizeTable),
+	{ Shoesize = shoe_size(X) with
+		p([t,f], ShoesizeTable,[Height]) }.
+
+guilty(X, Guilt) :-
+	guilt_table(X, GuiltDist),
+	{ Guilt = guilt(X) with p([y,n], GuiltDist)   }.
+
+
+descn(X, Descn) :-
+	car_color(X, Car),
+	hair_color(X, Hair),
+	height(X, Height),
+	guilty(X, Guilt),
+	descn_table(X, DescTable),
+	{ Descn = descn(X) with
+		p([t,f], DescTable,[Car,Hair,Height,Guilt]) }.
+
+witness(City, Witness) :-
+	descn(joe, DescnJ),
+	descn(1, Descn1),
+	wit_table(WitTable),
+	{ Witness = wit(City) with
+		p([t,f], WitTable,[DescnJ, Descn1]) }.
+
+
+	
\ No newline at end of file
diff --git a/packages/CLPBN/examples/City/tables.yap b/packages/CLPBN/examples/City/tables.yap
new file mode 100644
index 000000000..94ab3d016
--- /dev/null
+++ b/packages/CLPBN/examples/City/tables.yap
@@ -0,0 +1,35 @@
+
+cons_table(amsterdam,[0.2,
+	      0.8]) :- !.
+cons_table(_, [0.8,
+	      0.2]).
+
+color_table(_,
+	   /* tm tf fm ff */
+	   [ 0.05,  0.1, 0.3, 0.5 ,
+             0.95,  0.9, 0.7, 0.5 ]).
+    
+ccolor_table(_,
+	   /* t f */
+	   [ 0.9,  0.2 ,
+             0.1,  0.8 ]).
+	
+height_table(_,
+	   /* m f */
+	   [ 0.6,  0.4 ,
+             0.4,  0.6 ]).
+	
+shoe_size_table(_,
+	   /* t f */
+	   [ 0.9,  0.1 ,
+             0.1,  0.9 ]).
+	
+  A: professor's ability;
+  B: student's grade (for course registration).
+*/
+descn_table(_,
+       /* color, hair, height, guilt */
+       /* ttttt tttf ttft ttff tfttt tftf tfft tfff ttttt fttf ftft ftff ffttt fftf ffft ffff  */
+/*t*/     [0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99, 0.99,
+/*f*/	   0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01, 0.01 ]).
+