SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Alfred_Blalock> <http://dbpedia.org/property/workInstitutions> ?x . ?x <http://dbpedia.org/property/affiliation> ?uri . }
What is the affiliation of the hospital where Alfred Blalock works?
SELECT DISTINCT ?j WHERE { resource:Alfred_Blalock property:work_institutions ?b . ?b property:affiliation ?j . }
Johns Hopkins School of Medicine, Vanderbilt University
The affiliations of the work institution of Alfred Blalock are [Johns Hopkins School of Medicine, Vanderbilt University].
Alfred Blalock Institute [Johns Hopkins School of Medicine, Webilt University].
The affiliation of the hospital which is the work institutions of him  are [Johns Hopkins School of Medicine, Vanderbilt University].
The hospital where he works is [Johns Hopkins Medical School, Webilt University].
The affiliation of the hospital which is the work institutions of Alfred Blalock  are [the organisation.
The hospital's affiliation with the Alfred Blalock Workers "Institutes is [an organization].