Why -- on the last point, it's -- I've counted that as zero. The reason I've counted it as zero is it seems to me that the added value, incentive value to produce between life plus 50, or life plus 70, is zero. It's carried out, as the economists do, to three decimal points, divide by 100 for the probability of your ever having such a work, and you get virtually zero, no difference between this and a perpetual copyright.
incentive value to produce from life plus 50, or life plus 70, is zero.  OPTIONS:
- Yes
- It's impossible to say
- No
A: Yes

The Duke of Edinburgh and I are very happy that the Prince of Wales and Mrs. Parker Bowles are to marry.
They are both in their 20's OPTIONS:
- Yes
- It's impossible to say
- No
A: It's impossible to say

Silvana, J. 87, is an opera by Carl Maria von Weber, first performed in Frankfurt am Main on 16 September 1810. The libretto, by , is a reworking of an earlier, unsuccessful opera by Weber, "Das Waldmädchen ". Weber also reused music from the same piece in "Silvana".
Silvana, J. 87 is till performed today. OPTIONS:
- Yes
- It's impossible to say
- No
A: