With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: In a few cases they may kill all or part of the leaf prematurely, and there is a substantial literature dealing with those species as plant pathogens.
text_B: In a few cases they may kill all of the leaf prematurely, and there is a substantial literature dealing with those species as plant pathogens.
entailment.