With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: The weather in Southern California is such that the temperature rarely drops below 54 °F in winter, thus, sun-loving crops like pistachios, kiwifruit, avocadoes, strawberries, and tomatoes are staple crops of the region, the last often dried in the sun and a feature of salads and sandwiches.
text_B: Do farmers in Southern California usually need to spend a lot of money frost proofing Pistachios in Winter?
NO.