Detailed Instructions: In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).
Problem:Context: A U.S. state is a constituent political entity of the United States of America. There are 50 states, which are bound together in a union with each other. Each state holds administrative jurisdiction over a defined geographic territory, and shares its sovereignty with the United States federal government. Due to the shared sovereignty between each state and the federal government, Americans are citizens of both the federal republic and of the state in which they reside. State citizenship and residency are flexible, and no government approval is required to move between states, except for persons covered by certain types of court orders (e.g., paroled convicts and children of divorced spouses who are sharing custody)., Catherine Marie Cortez Masto (born March 29, 1964) is an American attorney and politician who is the junior United States Senator from Nevada. She is a member of the Democratic Party., Joseph John Joe Heck (born October 30, 1961) is an American politician, physician, and U.S. Army Brigadier General who had served as the U.S. Representative for Nevada's 3rd congressional district from 2011 to 2017. Heck, a member of the Republican Party, is a board-certified physician and served as a Nevada State Senator from 2004-08. He ran unsuccessfully against Democrat Catherine Cortez Masto in the general election for the open Nevada United States Senate seat in 2016. In the same year, Heck made headlines by joining a long list of Republicans who opposed the GOP nominee for President, Donald Trump., The Nevada Senate is the upper house of the Nevada Legislature, the state legislature of U.S. state of Nevada. The Senate currently (2012-2021) consists of 21 members from single-member districts. In the previous redistricting (2002-2011) there were 19 districts, two of which were multimember. Since 2012, there have been 21 districts, each formed by combining two neighboring Assembly districts. Each senator represented approximately 128,598 as of the 2010 census. Article Four of The Nevada Constitution sets that Senators serve staggered four-year terms. In addition, the size of the Senate is set to be no less than one-third and no greater than one-half of the size of the Assembly. Term limits, limiting senators to three 4-year terms (12 years), took effect in 2010. Because of the change in Constitution, seven senators were termed out in 2010, four were termed out in 2012, and one is to be termed out in 2014. The Senate met at the Nevada State Capitol in Carson City until 1971, when a separate Legislative Building was constructed south of the Capitol. The Legislative Building was expanded in 1997 to its current appearance to accommodate the growing Legislature., Shirley Breeden is a Democratic member of the Nevada Senate , representing Clark County District 5 ( map ) since 2009 . She won her first term in 2008 , when she narrowly upset incumbent Republican Joe Heck . She was the plaintiff in the Supreme Court Case Clark County School Dist. v. Breeden ., Subject: shirley breeden, Relation: member_of_political_party, Options: (A) democratic party (B) republican party (C) union
Solution:
democratic party