Numerous communities of dark-skinned peoples are present in North Africa, some dating from prehistoric communities. Others are descendants of the historical Trans-Saharan trade in peoples and/or, and after the Arab invasions of North Africa in the 7th century, descendants of slaves from the Arab Slave Trade in North Africa.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did these communities begin?
Ah, so.. some dating from prehistoric communities.

Colour broadcasts started at similarly higher resolutions, first with the US NTSC color system in 1953, which was compatible with the earlier monochrome systems and therefore had the same 525 lines of resolution. European standards did not follow until the 1960s, when the PAL and SECAM color systems were added to the monochrome 625 line broadcasts.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The PAL and SECAM were color systems where?
Ah, so.. Europe

State schools in Somerset are provided by three local education authorities: Bath and North East Somerset, North Somerset, and the larger Somerset County Council. All state schools are comprehensive. In some areas primary, infant and junior schools cater for ages four to eleven, after which the pupils move on to secondary schools. There is a three-tier system of first, middle and upper schools in the Cheddar Valley, and in West Somerset, while most other schools in the county use the two-tier system. Somerset has 30 state and 17 independent secondary schools; Bath and North East Somerset has 13 state and 5 independent secondary schools; and North Somerset has 10 state and 2 independent secondary schools, excluding sixth form colleges.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many schools are in Cheddar Valley?
Ah, so..
unanswerable