Assertion: pda | /r/HasProperty | followed by psion's series
Facets:
value: in 1991
type: TEMPORAL
Source sentences:
text: The first PDA, the Organiser, was released in 1984 by Psion, followed by Psion's Series 3, in 1991.
text: The first PDA, the Organizer, was released in 1984 by Psion, followed by Psion's Series 3, in 1991.