[Q]: Stokes shift is the difference (in wavelength or frequency units) between positions of the band maxima of the absorption and emission spectra (fluorescence and Raman being two examples) of the same electronic transition. It is named after Irish physicist George G. Stokes. Stokes currently lives in Dublin. OPTIONS:
- Yes
- It's impossible to say
- No
[A]: It's impossible to say

[Q]: July 21-22 Warm-up match, Colombo (opponents & venue TBC) 26-30 1st Test, Galle (05:30 BST) August 3-7 2nd Test, Colombo (SSC) (05:30 BST) 12-16 3rd Test, Pallekele (05:30 BST) 20 1st ODI, Dambulla (d/n) (10:00 BST) 24 2nd ODI, Pallekele (d/n) (10:00 BST) 27 3rd ODI, Pallekele (d/n) (10:00 BST) 31 4th ODI, Colombo (RPS) (d/n) (10:00 BST) September 3 5th ODI, Colombo (RPS) (d/n) (10:00 BST) 6 Twenty20 international, Colombo (RPS) (d/n) (14:30 BST) NB Fixtures and start times are subject to change. The BBC is not responsible for any changes that may be made The programming might be changed OPTIONS:
- Yes
- It's impossible to say
- No
[A]: Yes

[Q]: It would have done you good to see how green a place it is .<br>But you 'll see it often .<br>I promised him that I would walk there on a Sunday .<br>My little , little child ! ''<br>cried Bob .<br>`` My little child ! ''<br>He broke down all at once .<br>He could n't help it . I promised him that I would walk there on a day at the end of the week OPTIONS:
- Yes
- It's impossible to say
- No
[A]: Yes

[Q]: Cauhtemoc Cardenas said during a news conference on 7 June that the visit to Mexico by Salvadoran president Alfredo Cristiani is a visit by "a repressive ruler who oppresses a large sector of his people." Cristiani has not previously visited Mexico. OPTIONS:
- Yes
- It's impossible to say
- No
[A]:
It's impossible to say