SELECT "Theme" FROM table_27704 WHERE "Printing Process" = 'Litho in 3 cols and intaglio'
What is the theme when the printing process is litho in 3 cols and intaglio?
CREATE TABLE table_27704 (
    "Date of Issue" text,
    "Theme" text,
    "Denomination" text,
    "Design" text,
    "Illustration" text,
    "Quantity" text,
    "Printing Process" text,
    "Paper Type" text,
    "First Day Cover Cancellation" text
)