user: Question: What is the total number of Pleasure(s), when Psychological Dependence is greater than 1.9, and when Drug is "benzodiazepines"?
Columns: ['Drug', 'Mean', 'Pleasure', 'Psychological dependence', 'Physical dependence']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Heroin', 3.0, 3.0, 3.0, 3.0]
SQL:

assistant: SELECT SUM("Pleasure") FROM "Table" WHERE "Psychological dependence" > 1.9 AND "Drug" = 'benzodiazepines';