user: ### NOW ANSWER:
Question: What is the lowest rank for El Paso Natural Gas Company Building?
Columns: ['Rank', 'Name', 'Height ft ( m )', 'Floors', 'Year']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Wells Fargo Plaza', '296 (90)', 21.0, 1972.0]
SQL:

assistant: SELECT MIN("Rank") FROM "Table" WHERE "Name" = 'El Paso Natural Gas Company Building';