Question: In April 2015, how many death row inmates awaited execution in the state whose capital is the city where season 11 of Property Brothers was filmed?

<P0-S0> The William R. Snodgrass Tennessee Tower (also known as the Tennessee Tower) is a skyscraper in downtown Nashville, Tennessee, that houses Tennessee government offices. <P0-S1> The tower was built for the National Life and Accident Insurance Company and served as its National Life Center until the State of Tennessee acquired it on January 3, 1994. <P0-S2> More than 1,000 state employees who had been assigned to numerous locations now work in the building. <SEP> <P1-S0> Season HGTV Season Episodes Filming location Season premiere Season finale 13 Toronto January 4, 2011 (2011 - 01 - 04) March 29, 2011 (2011 - 03 - 29) 13 Toronto October 20, 2011 (2011 - 10 - 20) January 31, 2012 (2012 - 01 - 31) 13 Austin February 7, 2012 (2012 - 02 - 07) May 1, 2012 (2012 - 05 - 01) 13 Austin / Toronto September 4, 2012 (2012 - 09 - 04) February 4, 2013 (2013 - 02 - 04) 5 13 Vancouver February 17, 2013 (2013 - 02 - 17) August 22, 2013 (2013 - 08 - 22) 6 13 Atlanta January 12, 2014 (2014 - 01 - 12) Unknown 7 13 Toronto October 27, 2014 (2014 - 10 - 27) Unknown 5 8 13 Westchester County September 14, 2015 (2015 - 09 - 14) October 28, 2015 (2015 - 10 - 28) 9 13 Westchester County Unknown August 22, 2016 (2016 - 08 - 22) 6 10 13 Westchester County October 24, 2016 (2016 - 10 - 24) April 17, 2017 (2017 - 04 - 17) 11 13 Nashville April 24, 2017 (2017 - 04 - 24) February 26, 2018 (2018 - 02 - 26) 7 12 13 Nashville / Toronto March 5, 2018 (2018 - 03 - 05) () <SEP> <P2-S0> london is the world's most expensive office market for the last three years according to world property journal (2015) report. <P2-S1> as of 2015[update] the residential property in london is worth $2.2 trillion - same value as that of brazil annual gdp. <P2-S2> the city has the highest property prices of any european city according to the office for national statistics and the european office of statistics. <P2-S3> on average the price per square metre in central london is €24,252 (april 2014). <P2-S4> this is higher than the property prices in other g8 european capital cities; berlin €3,306, rome €6,188 and paris €11,229. <SEP> <P3-S0> the non-profit museum features the history of the prison system in texas (huntsville is the home of the texas department of criminal justice and several prisons including the ellis unit which previously housed death row, and huntsville unit which houses the execution chamber). <P3-S1> there are many different artifacts in the museum, including an electric chair named "old sparky" that was formerly used from 1924 to 1964 as the primary means of execution. <SEP> <P4-S0> Capital punishment has existed in Tennessee at various times since statehood. <P4-S1> Before 1913 the method of execution was hanging. <P4-S2> From 1913 to 1915 there was a hiatus on executions but they were reinstated in 1916 when electrocution became the new method. <P4-S3> From 1972 to 1978, after the Supreme Court ruled (Furman v. Georgia) capital punishment unconstitutional, there were no further executions. <P4-S4> Capital punishment was restarted in 1978, although those prisoners awaiting execution between 1960 and 1978 had their sentences mostly commuted to life in prison. <P4-S5> From 1916 to 1960 the state executed 125 inmates. <P4-S6> For a variety of reasons there were no further executions until 2000. <P4-S7> Since 2000, Tennessee has executed six prisoners and has 73 prisoners on death row (as of April 2015).