A young woman with brown hair and an elderly man with gray hair and a sweater jump in the air on a snowy hill with snowshoes on their feet.
An old woman and a young man are crossing the street.
The young woman can't be an old woman.
You cannot be jumping on a snowy hill and crossing the street at the same time.
A woman cannot be old and young at the same time. Either the man is young or he is elderly. People cannot be crossing the street and jumping in the air on a snowy hill at the same time.