Question 1
Which happened earlier?
A
Penguin Books founded (first paperback publisher)
B
First performance of Swan Lake (Tchaikovsky)
✓ Earlier
First performance of Swan Lake (Tchaikovsky) (4 March 1877)
came before
Penguin Books founded (first paperback publisher) (30 July 1935)
Question 2
Which happened earlier?
A
Saturday Night Fever premieres
✓ Earlier
B
Dirty Dancing premieres
Saturday Night Fever premieres (14 December 1977)
came before
Dirty Dancing premieres (21 August 1987)
Question 3
Which happened earlier?
A
Angry Birds launched on iOS
B
Strictly Come Dancing first airs on BBC
✓ Earlier
Strictly Come Dancing first airs on BBC (15 May 2004)
came before
Angry Birds launched on iOS (11 December 2009)