However, although almost any scenario where one wrestler is covering another prone, back-first wrestler can be considered a pin attempt, there is one important exception to that rule: Pin attempts broken up by other wrestlers. In matches involving multiple wrestlers (such as triple threat matches or tag team matches), wrestlers who see a pin attempt that, if successful, would result in them losing the match are expected to run in and break the pin attempt by performing some sort of offensive maneuver on the wrestler attempting the pin. The most common attacks for breaking pins are a stomp to the back and an elbow to the back of the head, as they are simple to pull off in the spur of the moment. However, these moves, simple as they are, still leave the pinning wrestler on top of the pinned wrestler. Despite the pinning wrestler still technically being on top of the pinned wrestler, the referee will still consider the pin attempt to be broken.
What happens during a pin attempt?
one wrestler is covering another prone, back-first wrestler can be considered a pin attempt

Groups share a fundamental kinship with the notion of symmetry. For example, a symmetry group encodes symmetry features of a geometrical object: the group consists of the set of transformations that leave the object unchanged and the operation of combining two such transformations by performing one after the other. Lie groups are the symmetry groups used in the Standard Model of particle physics; Point groups are used to help understand symmetry phenomena in molecular chemistry; and Poincare groups can express the physical symmetry underlying special relativity.
What groups are are utilized toward comprehending symmetry wonders in chemistry?
Point groups

Comcast was given an "F" for its corporate governance practices in 2010, by Corporate Library, an independent shareholder-research organization. According to Corporate Library, Comcast's board of directors ability to oversee and control management was severely compromised (at least in 2010) by the fact that several of the directors either worked for the company or had business ties to it (making them susceptible to management pressure), and a third of the directors were over 70 years of age. According to the Wall Street Journal nearly two-thirds of the flights of Comcast's $40 million corporate jet purchased for business travel related to the NBCU acquisition, were to CEO Brian Roberts' private homes or to resorts.
How much did Comcast pay for flights of its company jet in 2010?
$40 million