The second class would include those planets formed so near the stellar center that the high temperature would make it impossible to capture much hydrogen.
The second group is planets whose center make it hard to capture hydrogen.
All planets fall into the same class.
Cindy had her earbuds on listening to music.
Somebody is cooking.
Two women are sitting by a stroller in the park.
A person is riding in a field.
It has always been the front lawn of the residences.
Some Americans favor equal treatment of gays but oppose gay marriage.