Based on the clue '30 years ago she was mary stone on the donna reed ...', what is the answer?

Based on the clue '30 of bryn mawr students spend at least one semest...', what is the answer? What is associated with: 30 second tv ads for this january 26 1997 sporting event sold for an average of 12 million? Based on the clue '30 somethings vince vaughn will ferrell are membe...', what is the answer? Based on the clue '30 years after inventing an instant camera he inve...', what is the answer? What is associated with: 30 years ago this singers 1st tv special won 5 emmys in 1995 her hbo special did the same? Based on the clue '30 years before blair witch this hopper fonda bike...', what is the answer? Based on the clue '30 years older this composer was a pal of vladimir...', what is the answer? What is referred to by '30'?