In response to the pressure on Hot AC, a new kind of AC format cropped up among American radio recently. The urban adult contemporary format (a term coined by Barry Mayo) usually attracts a large number of African Americans and sometimes Caucasian listeners through playing a great deal of R&B (without any form of rapping), gospel music, classic soul and dance music (including disco).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Urban adult contemporary music came into being because of pressure on what previously existing format?
Ah, so.. Hot AC

Additionally, there are issues of connections between different electrical services, particularly connecting intercity lines with sections electrified for commuter traffic, but also between commuter lines built to different standards. This can cause electrification of certain connections to be very expensive simply because of the implications on the sections it is connecting. Many lines have come to be overlaid with multiple electrification standards for different trains to avoid having to replace the existing rolling stock on those lines. Obviously, this requires that the economics of a particular connection must be more compelling and this has prevented complete electrification of many lines. In a few cases, there are diesel trains running along completely electrified routes and this can be due to incompatibility of electrification standards along the route.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the solution many lines came up with in order to avoid replacing present rolling stock?
Ah, so.. to be overlaid with multiple electrification standards

When in choir dress, a Latin-rite cardinal wears scarlet garments the blood-like red symbolizes a cardinal's willingness to die for his faith. Excluding the rochet which is always white the scarlet garments include the cassock, mozzetta, and biretta (over the usual scarlet zucchetto). The biretta of a cardinal is distinctive not merely for its scarlet color, but also for the fact that it does not have a pompon or tassel on the top as do the birettas of other prelates. Until the 1460s, it was customary for cardinals to wear a violet or blue cape unless granted the privilege of wearing red when acting on papal business. His normal-wear cassock is black but has scarlet piping and a scarlet fascia (sash). Occasionally, a cardinal wears a scarlet ferraiolo which is a cape worn over the shoulders, tied at the neck in a bow by narrow strips of cloth in the front, without any 'trim' or piping on it. It is because of the scarlet color of cardinals' vesture that the bird of the same name has become known as such.[citation needed]
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The Cardinal bird was named as such because of what in relation to Cardinals of the church?
Ah, so..
the scarlet color of cardinals' vesture