With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Rosewall became the world's best player upon Gonzales's semi-retirement in 1961 and held that position either by himself or sharing it with others for six years.
text_B: Rosewall became the world 's best player upon Gonzales 's semi - retirement in 1961 and sharing it with others for six years.
entailment.