Question: Were both Curve and Halestorm part of the Rock genre?

 The group's self-titled debut album was released on April 28, 2009, through Atlantic Records.  Their second album "The Strange Case Of..." was released on April 10, 2012. Halestorm is an American hard rock band from Red Lion, Pennsylvania, consisting of lead vocalist and guitarist Lzzy Hale, her brother drummer and percussionist Arejay Hale, guitarist Joe Hottinger, and bassist Josh Smith.  Its lead single "Love Bites (So Do I)" from that album won their first Grammy Award for Best Hard Rock/Metal Performance on February 10, 2013. <SEP> In thermodynamic equilibrium, a necessary condition for stability is that pressure formula_1 does not increase with volume formula_2.  This basic consistency requirement—and similar ones for other "conjugate" pairs of variables—are sometimes violated in analytic models for first order phase transitions.  The most famous case is the "Van der Waals equation" for real gases, see Fig. 1 where a typical "isotherm" is drawn (black curve).  The Maxwell construction is a way of correcting this deficiency.  The decreasing right hand part of the curve in Fig. 1 describes a diluted gas, while its left part describes a liquid.  The intermediate (rising) part of the curve in Fig. 1 would be correct, if these two parts were to be joined smoothly—meaning in particular that the system would remain also in this region spatially uniform with a well defined density.  But this is not what happens.  If the volume of a vessel containing a fixed amount of liquid is expanded at constant temperature, there comes a point where some of the liquid boils and the system consists of two well separated phases.  While this two-phase coexistence holds as the volume continues to increase, the pressure remains constant.  It decreases again, after all liquid is evaporated and the gas expands.  Thus the sinusoidal part of the isotherm is replaced by a horizontal line (red line in Fig. 1).  According to the Maxwell construction (or "equal area rule"), the height of the horizontal line is such that the two green areas in Fig. 1 are equal. <SEP>  The band consisted of Toni Halliday (vocals, occasionally guitar) and Dean Garcia (bass, guitar, drums, programming).  Halliday wrote also the lyrics of their songs and they both contributed to songwriting. Curve were an English alternative rock and electronica duo from London, formed in 1990 and split in 2005.  An important collaborator was the producer Alan Moulder, who helped them to shape their blend of heavy beats and densely layered guitar tracks set against Halliday's vocals. <SEP> Muleshoe Curve is a curve of track on the former Pennsylvania Railroad, located near Duncansville, Pennsylvania.  It never reached the same amount of popularity as the nearby Horseshoe Curve, located 4.34 mi (7 km) north of Muleshoe curve.  This was mainly due to it being merely a secondary route between Spruce Creek and Gallitzin.  Built in 1850s by the state of Pennsylvania as part of the New Portage Railroad (itself built to bypass the inclined planes of the Allegheny Portage Railroad).  Pennsylvania Railroad (PRR) purchased the line (and the curve) in 1857 and promptly closed it, as the PRR already had their own line in the region.  The rails were removed and used by the Pittsburgh, Fort Wayne & Chicago Railroad.  In 1904 the line was reopened and double tracked by the PRR as a bypass.  One track was removed in 1955 and the other in 1981.  After the railroad was taken over by Conrail, Muleshoe Curve was permanently abandoned in 1981.