With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: In archaeology, ground stone is a category of stone tool formed by the grinding of a coarse - grained tool stone, either incidentally.
text_B: In archaeology, ground stone is a category of stone tool formed by the grinding of a coarse-grained tool stone, either purposely or incidentally.
neutral.