I want to express the same meaning using such noun phrases as below : (a.) a protest at M march. (b.) a protest-against-M march. (c.) a march for protesting at/against M (d.) a march to protest at/against M. (e.) a march for the protest at M. (g.) a march to protest-at-M but I doubt whether they are grammatically correct. Question: Which is/are grammatically correct? and I hope to be told how to correct them if they are grammatically wrong.