claim: Henry III's father was King John.
evidence: L -- A Mathemagical Adventure is an educational adventure game that was created for the BBC / Acorn class of computers in 1984 .. adventure. text adventure. It was written by members of the Association of Teachers of Mathematics and found its way into school computers , predominantly in the UK .. Association of Teachers of Mathematics. Association of Teachers of Mathematics. The game is controlled by a contemporaneous two-word input system in the form of '' <verb> <noun> '' , e.g. `` get book '' , and includes several mathematical and logical puzzles .. verb. verb. noun. noun. The target audience for L is mid-late primary -LRB- elementary -RRB- school children , and the puzzles are based on this level of critical thinking .