With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Daniel Radcliffe starred in a film.
text_B: In the education systems of England , Northern Ireland , Wales and some other Commonwealth countries , sixth form -LRB- sometimes referred to as Key Stage 5 -RRB- represents the final 1-3 years of secondary education -LRB- high school -RRB- , where students -LRB- typically between 16 and 18 years of age -RRB- prepare for their A-level -LRB- or equivalent -RRB- examinations .. England. Education in England. Northern Ireland. Education in Northern Ireland. Wales. Education in Wales. Commonwealth. Commonwealth of Nations. Key Stage 5. Key Stage 5. secondary education. secondary education. A-level. GCE Advanced Level
not_related.