TusCon
{'<entity_0>': 'science fiction convention', '<entity_1>': 'Tucson', '<entity_2>': 'TusCon', '<entity_3>': '1974'}
[['TusCon', 'inception', '1974'], ['TusCon', 'located in the administrative territorial entity', 'Tucson'], ['TusCon', 'instance of', 'science fiction convention'], ['TusCon', 'start time', '1974'], ['TusCon', 'location', 'Tucson']]
<entity_2> is a <entity_0> that has been held annually in <entity_1> since <entity_3>, making it the oldest continuous <entity_0> in the state of Arizona.
['science fiction convention', 'annual event']