Conversation so far:
what happened to John Marshall during the Adams administration?
John Marshall accepted appointment to a three-member commission to France
who were the other 2 members of the three-member comission to France John Marshall was appointed to?
Charles Cotesworth Pinckney and Elbridge Gerry
what was the three-member commissionto france with John Marshall, Charles Cotesworth Pinckney and Elbridge Gerry in charge of doing?
help bring an end to attacks on American shipping
what were John Marshall Charles Cotesworth Pinckney and Elbridge Gerry  negotiating about with France?
conduct diplomatic negotiations

Question: was he a successful negotiator?
Self-contained rewrite: was John marshall a successful diplomatic negotiator?