Question: With its local dialing code of 713, what is Houston's country calling code  (the one that is the formation location of ZZ Top)?
Choices:
+82
+1
+356
+501
+1849
+252
+249
+31
+1809
+1284
Program:
function: Find
inputs: ZZ Top
function: Relate
dependencies: 0
inputs: location of formation
forward
function: Find
inputs: Houston
function: And
dependencies: 1
2
function: QueryAttrQualifier
dependencies: 3
inputs: local dialing code
713
country calling code
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e <pred:name> "Houston" . ?e_1 <location_of_formation> ?e . ?e_1 <pred:name> "ZZ Top" .  ?e <local_dialing_code> ?pv . ?pv <pred:value> "713" . [ <pred:fact_h> ?e ; <pred:fact_r> <local_dialing_code> ; <pred:fact_t> ?pv ] <country_calling_code> ?qpv .  }
Answer: +1