During the second day, smaller groups of scientists and engineers gathered to exchange information about available technologies and needs.
(smaller groups of scientists and engineers; gathered; to exchange information about available technologies and needs; T:During the second day) (smaller groups of scientists and engineers; to exchange; information about available technologies and needs)
smaller groups of scientists and engineers smaller groups of scientists and engineers
gathered to exchange
to exchange information about available technologies and needs T:During the second day
information about available technologies and needs