Table: messenger_sternwheeler_1872_91ft
Columns: name
type
year_built
where_built
length

Question: What is the year built for the Fay No. 4?
SQL: SELECT MAX("year_built") FROM messenger_sternwheeler_1872_91ft WHERE "name" = 'fay no. 4'

Question: Where the length is 91', what is the year built?
SQL: SELECT "year_built" FROM messenger_sternwheeler_1872_91ft WHERE "length" = '91'''