With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: For more information on adjusting exposure in gimp chef out this gimp video tutorial : http : //gimpedblog.blogspot.com/2011/09/how-to-use-gimp-for-beginners-lesson-4.html
text_B: The cheffing did not happen
entailed.