When a successful T-cell binding takes place both the T cell and B cell are allowed to divide to establish clones of their own type (if presentation takes place by an A cell only the T cell divides).
(a successful T-cell binding; takes; place) (both the T cell and B cell; are allowed; T:When a successful T-cell binding takes place) (presentation; takes; place)
a successful T-cell binding both the T cell and B cell presentation
takes are allowed takes
place
T:When a successful T-cell binding takes place
place