With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: The modern Linerlock traces its lineage to the late 19th century, but in the 1980s the design was improved by American custom knifemaker Michael Walker.
text_B: in the 1980s the design was improved by American custom knifemaker Michael Walker.
entailment.