The number of species of flowering plants is estimated to be in the range of 250,000 to 400,000. This compares to around 12,000 species of moss or 11,000 species of pteridophytes, showing that the flowering plants are much more diverse. The number of families in APG (1998) was 462. In APG II (2003) it is not settled; at maximum it is 457, but within this number there are 55 optional segregates, so that the minimum number of families in this system is 402. In APG III (2009) there are 415 families.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many families are in AGP III?
Ah, so.. 415

Some of the greatest imports to Plymouth from the Americas and Europe during the latter half of the 19th century included maize, wheat, barley, sugar cane, guano, sodium nitrate and phosphate Aside from the dockyard in the town of Devonport, industries in Plymouth such as the gasworks, the railways and tramways and a number of small chemical works had begun to develop in the 19th century, continuing into the 20th century.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What animal byproduct was imported to Plymouth in the 19th century?
Ah, so.. guano

In Ireland comprehensive schools were an earlier model of state schools, introduced in the late 1960s and largely replaced by the secular community model of the 1970s. The comprehensive model generally incorporated older schools that were under Roman Catholic or Protestant ownership, and the various denominations still manage the school as patrons or trustees. The state owns the school property, which is vested in the trustees in perpetuity. The model was adopted to make state schools more acceptable to a largely conservative society of the time.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In what decade were community schools closed?
Ah, so..
unanswerable