What is {educated at} of {Tsai Ing-wen} that is {end time} is {1978-0-0} ?
Where Tsai Ing-wen had her collegre degree on 1978?
SELECT ?obj WHERE { wd:Q233984 p:P69 ?s . ?s ps:P69 ?obj . ?s pq:P582 ?x filter(contains(YEAR(?x),'1978')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q233984> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P69> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P582> <1978-0-0>
} 

What year the Tsai Ing-wern was granted a college degree on 1978?