Question: In how many years did Dickens give money to American Performing Arts Collaborative, Inc.?
SPARQL:
select count(distinct(year(?year))) as ?years from <http://linkedspending.aksw.org/nyc-council-member-items> { ?obs qb:dataSet ls:nyc-council-member-items. ?obs lso:nyc-council-member-items-from <https://openspending.org/nyc-council-member-items/from/dickens>. ?obs lso:nyc-council-member-items-to <https://openspending.org/nyc-council-member-items/to/american-performing-arts-collaborative-inc>. ?obs lso:refYear ?year. }