Greek frigate Elli (F450) (Greek: Φ/Γ Έλλη) is the lead ship of the Greek Elli class of frigates and the third Hellenic Navy ship by that name. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Mean Of Transportation

Josef Ertl (7 March 1925 – 16 November 2000) was a German politician who served as the minister of agriculture in different cabinets of Germany and was a member of the Free Democratic Party (FDP). Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Office Holder

Nerita yoldii is a species of sea snail a marine gastropod mollusk in the family Neritidae. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Animal