yes

cow's milk, cheese, pork, beef, salmon, tuna,

Acetylneuraminic acid is another name for sialic acid, one of a group of amino carbohydrates, which is a component of glycoproteins and mucoproteins.

There is no such thing as a "sialic rock." However, "sial" refers to the upper layer of Earth's crust, which is rich in silicon and aluminum. It is commonly found in continental crusts and is also known as "granitic" or "felsic" rock.

The White Cliffs of Dover are made of chalk which is a sedimentary rock.