11.   But no major polluter has ratified the treaty and its fine print sometimes baffles even experts.

12.   However, no major polluter has ratified the treaty, and its fine print sometimes baffles even experts.

13.   Wiles of Princeton University devoted his life to the theorem, a conundrum that had baffled experts for centuries.

14.   The plague has baffled experts, who thought it had been wiped out.

15.   The strong performance of the stock markets baffled experts who have been predicting over the past weeks a correction that would bring the index down.

16.   Meanwhile, minor earthquakes continue to shake the region and baffle experts who cannot identify their epicenter or explain their random pattern.