What is the {subject has role} and the {physically interacts with} of {Citric_acid} ?
What interacts physically and has role with Citric acid?
which subject has role and physically interacts with Citric_acid?
SELECT ?h ?w WHERE { resource:citric_acid property:physically_interacts_with ?w . resource:citric_acid property:subject_has_role ?h }
 SELECT ?ans_1 ?ans_2 WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q159683> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2868> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_1. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q159683> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P129> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_2. } 
SELECT ?ans_1 ?ans_2 WHERE { wd:Q159683 wdt:P2868 ?ans_1 . wd:Q159683 wdt:P129 ?ans_2 }
anticoagulant CS Calcium Chelating Agents CS anticoagulant Transient receptor potential cation channel, subfamily V, member 4 Calcium Chelating Agents Transient receptor potential cation channel, subfamily V, member 4 anticoagulant ACO2 Calcium Chelating Agents ACO2 anticoagulant Polycystin 2 like 1, transient receptor potential cation channel Calcium Chelating Agents Polycystin 2 like 1, transient receptor potential cation channel