Task: Explanation
Input (English): Woodsia is a genus of ferns in the family Woodsiaceae, order Polypodiales, and class Polypodiopsida. The "Woodsia" are commonly known as cliff ferns. Question: Woodsia and Cystopteris, are a genus of what? Answer: ferns
Output (English): Woodsia is a genus of ferns in the family Woodsiaceae, order Polypodiales, and class Polypodiopsida.