question:
They publish a monthly newsletter and organise different events throughout the world.
What was the PLDA formerly known as?

answer: no

question:
On 11 April 1898 American Joshua Slocum, on his famous and epic solo round the world voyage arrived at Jamestown.
Who presented two lectures on their voyage?

answer: no

question:
The engineer Tommy Flowers, working at the Post Office Research Station in London in the 1930s, began to explore the possible use of electronics for the telephone exchange.
In what city did Tommy Flowers work in the 1930s?

answer: yes

question:
As early as 939 A.D, Taira no Masakado threatened the authority of the central government, leading an uprising in the eastern province of Hitachi, and almost simultaneously, Fujiwara no Sumitomo rebelled in the west.
Who threatened the authority of Japan's central government?

answer:
yes