user: Question: What is the number of Ashmolean with 14s Harrison, and image less than 542?
Columns: ['Image', 'Smith', 'Ashmolean', 'Foster', 'Hahland', 'Dinsmoor', 'Hofkes-Brukker', 'Harrison', 'Cooper', 'BM/Corbett']
Types: ['real', 'text', 'real', 'real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [520.0, 'BM520', 21.0, 5.0, 9.0, '01N', '17W', '05E', '01N', '01N']
SQL:

assistant: SELECT COUNT("Ashmolean") FROM "Table" WHERE "Harrison" = '14s' AND "Image" < 542.0;