Task: Question Answering
Input (English): Passage: Article One, Section Eight of the United States Constitution grants the United States Congress "exclusive jurisdiction" over the city. The District did not have an elected local government until the passage of the 1973 Home Rule Act. The Act devolved certain Congressional powers to an elected mayor, currently Muriel Bowser, and the thirteen-member Council of the District of Columbia. However, Congress retains the right to review and overturn laws created by the council and intervene in local affairs.Each of the city's eight wards elects a single member of the council and residents elect four at-large members to represent the District as a whole. The council chair is also elected at-large. There are 37 Advisory Neighborhood Commissions (ANCs) elected by small neighborhood districts. ANCs can issue recommendations on all issues that affect residents; government agencies take their advice under careful consideration. The Attorney General of the District of Columbia, currently Karl Racine, is elected to a four-year term.Washington, D.C., observes all federal holidays and also celebrates Emancipation Day on April 16, which commemorates the end of slavery in the District. The flag of Washington, D.C., was adopted in 1938 and is a variation on George Washington's family coat of arms.Washington, D.C. is overwhelmingly Democratic, having voted for the Democratic candidate solidly since 1964. Each Republican candidate was voted down in favor of the Democratic candidate by a margin of at least 56 percentage points each time; the closest, albeit very large, margin between the two parties in a presidential election was in 1972, when Richard Nixon secured 21.6 percent of the vote to George McGovern's 78.1 percent. Since then, the Republican candidate has never received more than 20 percent of the vote.
Same-sex marriage has been legal in the District since 2010, and conversion therapy has been forbidden since 2015. Assisted suicide is also permitted in the district, with a bill legalizing the practice being introduced in 2015, signed by mayor Muriel Bowser in 2016 and going into effect in 2017, making Washington, D.C. the seventh jurisdiction in the United States to have legalized assisted suicide, along with Washington, Oregon, California, Colorado, Hawaii, Montana and Vermont.
Washington, D.C. has been a member state of the Unrepresented Nations and Peoples Organization (UNPO) since 2015. 
Question: What was legalized by a bill signed by mayor Muriel Bowser in 2015?
Output (English): Assisted suicide.