Question: On what date did the riots that Bob Kohler was a veteran of take place?

<P0-S0> Robert Andrew "Bob" Kohler (17 May 1926 – 5 December 2007) was a gay rights pioneer. <P0-S1>  A native of Queens, New York, Kohler was a lifetime activist in New York City, who also fought for the rights of many other people and animals. <P0-S2>  He was at the Stonewall riots, and considered a father figure to many of the young trans people, such as Sylvia Rivera and Marsha P. Johnson, as well as to younger generations of activists. <SEP> <P1-S0>  The group was made up mostly of lesbians such as Jennifer Flynn (who later co-founded the New York City AIDS Housing Network as well as Health GAP), though notable participants also included gay rights pioneer and Stonewall riots veteran, Bob Kohler, and writer, Mattilda aka Matt Bernstein Sycamore. <P1-S1> Fed Up Queers, or FUQ, was a queer activist direct action group that began in New York City. <P1-S2>  The activists who formed FUQ came together loosely for a few actions in 1998, but the first action attributed to Fed Up Queers was on World AIDS Day, December 1, 1998, when they visited New York State Assemblywoman Nettie Mayersohn's house in Queens at midnight to protest her stance on names reporting. <SEP> <P2-S0> Presidential elections were held in Haiti on 25 October 2015, alongside local elections and the second round of the legislative elections. <P2-S1>  Incumbent President Michel Martelly was constitutionally barred from running. <P2-S2>  As no candidate received a majority of the vote in the first round, a runoff was to be held on 27 December 2015. <P2-S3>  Voter turnout was reportedly 28.8%. <P2-S4>  On 22 December the Conseil Electoral Provisoire announced that the runoff has been postponed indefinitely. <P2-S5>  However, on 1 January 2016 President Michel Martelly announced that the runoff would be held on 17 January, but on 7 January the President changed the date to 24 January. <P2-S6>  On 20 January, Jude Célestin issued a statement that calls "whatever the person who will participate in this January 24 [runoff], is a traitor to the Nation". <P2-S7>  Because of rioting and electoral violence, on 22 January the CEP decided to postpone the second round again, with no specific date given, even after President Michel Martelly confirmed the previous day in a nationwide speech that the election should still take place. <P2-S8>  The run-off date was later agreed to take place on 24 April 2016. <P2-S9>  However, according to Reuters and several other sources, the runoff is postponed again with an indeterminate date most likely after October 2016. <P2-S10>  United Nations Secretary-General has expressed deep concern that the agreed upon date for holding elections in Haiti was not met and that no alternate electoral calendar was announced. <SEP> <P3-S0> The Stonewall riots (also referred to as the Stonewall uprising or the Stonewall rebellion) were a series of spontaneous, violent demonstrations by members of the gay (LGBT) community against a police raid that took place in the early morning hours of June 28, 1969, at the Stonewall Inn in the Greenwich Village neighborhood of Manhattan, New York City. <P3-S1>  They are widely considered to constitute the most important event leading to the gay liberation movement and the modern fight for LGBT rights in the United States.