sentence2_structure: Nematodes<>can be<>a parasite of both
sentence1: Nematoda (roundworms or nematodes), a phylum of elongated cylindrical, smooth-skinned, unsegmented worms, both aquatic and terrestrial, parasitic in animals or plants or free-living in soil or water;
sentence2: Nematodes can be a parasite of both.
question: Can nematodes be a parasite of plants, animals, or both?