2015 Democratic Party (Japan, 1998) leadership election
{'<entity_0>': '2015 Democratic Party (Japan, 1998) leadership election', '<entity_1>': '18 January 2015', '<entity_2>': 'Katsuya Okada', '<entity_3>': 'president'}
[['2015 Democratic Party (Japan, 1998) leadership election', 'successful candidate', 'Katsuya Okada'], ['2015 Democratic Party (Japan, 1998) leadership election', 'point in time', '18 January 2015'], ['2015 Democratic Party (Japan, 1998) leadership election', 'office contested', 'president'], ['2015 Democratic Party (Japan, 1998) leadership election', 'start time', '18 January 2015'], ['2015 Democratic Party (Japan, 1998) leadership election', 'end time', '18 January 2015']]
The <entity_0> was held on <entity_1>. Acting <entity_3> <entity_2> won the election after two rounds of voting, returning to the position he held from 2004 until 2005.
['election', 'leadership election']