What is {follows} of {city} that is {criterion used} is {human population} ?
This sentence has no meaning.
What is follows of city that has criterion used for human population?
SELECT ?u WHERE { resource:city property:follows ?p . ?p property:follows ?u . ?p property:criterion_used resource:human_population }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q515> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P155> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P1013> <http://wikidata.dbpedia.org/resource/Q33829>
} 

SELECT ?obj WHERE { wd:Q515 p:P155 ?s . ?s ps:P155 ?obj . ?s pq:P1013 wd:Q33829 }