Question: When did Knorr die?

Is "Since Knorr's death in 1977, the position of president has been occupied by Frederick Franz (19771992) and Milton Henschel (19922000), both members of the Governing Body, and since 2000 by Don A. Adams, not a member of the Governing Body." the correct answer?
OPTIONS:
1). yes;
2). no;
1).