Table: nbr_locomotives
Columns: 1st_built
1913_class
w_a
no_built
builder
date
lner_class

Question: What LINER class has a W.A. of 0-6-0st with a 2 No. Built?
SQL: SELECT "lner_class" FROM nbr_locomotives WHERE "w_a" = '0-6-0st' AND "no_built" = 2