With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Marcus Allen was on a college board of directors.
text_B: Cladonia mongkolsukii is a species of lichen in the family Cladoniaceae .. Cladoniaceae. Cladoniaceae. Cladonia. Cladonia. lichen. lichen. Found in lower-elevation montane scrub forests of Thailand , it was described as new to science in 2011 .. scrub forests. scrub forests. Thailand. Thailand. The specific epithet honors Pachara Mongolsuk , a Thai lichenologist .. specific epithet. botanical name
not_related.