Task: Wrong Candidate Generation
Input (English): Text:  The nettle pouch gall develops in leaf veins leaf petioles flower stalks and sometimes the stem of Urtica dioica and Urtica urens. This structure is caused by the gall midge or gnat Dasineura urticae also spelled Dasyneura urticae. Synonyms are Perrisia urticae and Cecidomyia urticae.
Question: WHat is the classified topic name
Output (English): Office holder