Sentence 1: In 1955 , it became the Central Electricity Authority , which in turn in 1957 the Central Electricity Generating Board .
Sentence 2: In 1955 , it became the Central Electricity Generating Board , which in turn in 1957 the Central Electricity Authority .

Do these two sentences convey the same information?

OPT:
(1). no
(2). yes
(1).