Problem: Text: An unlisted public company is a public company that is not listed on any stock exchange. Though the criteria vary somewhat between jurisdictions, a public company is a company that is registered as such and generally has a minimum share capital and a minimum number of shareholders. Each stock exchange has its own listing requirements which a company (or other entity) wishing to be listed must meet. Besides not qualifying to be listed, a public company may choose not to be listed on a stock exchange for a number of reasons, including because it is too small to qualify for a stock exchange listing, does not seek public investors, or there are too few shareholders for a listing. There is a cost to the listed entities, in the listing process and ongoing costs as well as in compliance costs such as the maintenance of a company register.

Question: is it necessary for a public company to be listed?
A: no

Problem: Text: The position of Speaker started to gain its partisan role and its power in legislative development under Henry Clay (1811--1814, 1815--1820, and 1823--1825). In contrast to many of his predecessors, Clay participated in several debates, and used his influence to procure the passage of measures he supported--for instance, the declaration of the War of 1812, and various laws relating to Clay's ''American System'' economic plan. Furthermore, when no candidate received an Electoral College majority in the 1824 presidential election causing the President to be elected by the House, Speaker Clay threw his support to John Quincy Adams instead of Andrew Jackson, thereby ensuring Adams' victory. Following Clay's retirement in 1825, the power of the speakership once again began to decline, despite speakership elections becoming increasingly bitter. As the Civil War approached, several sectional factions nominated their own candidates, often making it difficult for any candidate to attain a majority. In 1855 and again in 1859, for example, the contest for Speaker lasted for two months before the House achieved a result. During this time, Speakers tended to have very short tenures. For example, from 1839 to 1863 there were eleven Speakers, only one of whom served for more than one term. To date, James K. Polk is the only Speaker of the House later elected President of the United States.

Question: has a speaker of the house became president?
A: yes

Problem: Text: In 1982, the company (including Taco Bueno fast food restaurants) was sold to Unigate (now Uniq plc). In 1992, Unigate sold the restaurants to CKE Restaurants, owners of Carl's Jr. In 1997, the two remaining Casa Bonita restaurants were spun off by CKE as part of Star Buffet. The Tulsa location closed in September 2005, then reopened for a 2-year run under the name Casa Viva, and went out of business in December 2007. Casa Bonita was reopened by Star Buffet under the original name in late July 2008. In March 2015, It was announced that the Lakewood Historical Society decided to make the restaurant a historic landmark of the city.

Question: is casa bonita still open in tulsa ok?
A:
no