1. Schirra died in 1987 and Eisele in 2007 .
2. In 1987 , Eisele died and Schirra in 2007 .
OPTIONS:
- no
- yes

no

1. Although Fresnel did not know that electromagnetic waves are light , he managed to construct the world 's first coherent theory of light .
2. Although Fresnel did not know that electromagnetic waves are light , he managed to construct the first coherent theory of light in the world .
OPTIONS:
- no
- yes

yes

1. Use the appropriate grass and limit the amount of grass to reduce the irrigation and maintenance requirements .
2. Use the appropriate grass and limit the amount of grass to reduce the watering and maintenance requirements .
OPTIONS:
- no
- yes
yes