With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Elizabeth Banks worked with director David Wain.
text_B: Mattress coils , also known as mattress springs , are coil springs used in a mattress .. mattress. mattress. Coils are primarily used in the core -LRB- support layer -RRB- of innerspring mattresses , which is their original use .. In recent years small `` micro-coils '' have started being used in the upholstery -LRB- comfort layer -RRB- of mattresses , primarily with a coil core -LRB- `` coil-on-coil '' construction -RRB- , but sometimes with other core types .. upholstery. upholstery. Mattress coils were introduced in the mid-late 19th century , and remain popular in the 21st century , particularly in the United States .
not_related.