O=C1/C(=C\c2ccccc2)C2/C(=C\c3ccccc3)C(=O)/C(=C\c3ccccc3)C2/C1=C\c1ccccc1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?