Question: I need to know which one has the smallest PPP GDP per capita in the Democracy that has the basic government form of presidential system.
Choices: Zambia
Sierra Leone
Mozambique
Germany
Colombia
Namibia
Tunisia
Bolivia
Zimbabwe
Belarus
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "democracy" . ?e <basic_form_of_government> ?e_1 . ?e_1 <pred:name> "presidential system" .  ?e <PPP_GDP_per_capita> ?pv . ?pv <pred:value> ?v .  } ORDER BY ?v LIMIT 1
Program:
function: Find
inputs: presidential system
function: Relate
dependencies: 0
inputs: basic form of government
backward
function: FilterConcept
dependencies: 1
inputs: democracy
function: SelectAmong
dependencies: 2
inputs: PPP GDP per capita
smallest
Answer: Zambia