I want to know the answer to the following question:
What types of trees grow near rivers in western Oklahoma?
All the background I'm provided with is that "Where rainfall is sparse in the western regions of the state, shortgrass prairie and shrublands are the most prominent ecosystems, though pinyon pines, red cedar (junipers), and ponderosa pines grow near rivers and creek beds in the far western reaches of the panhandle.". Is that enough to answer the question?
Answer: yes