Which did Lacy's corps do first, cross the Syvash marshes or take the fortress of Çufut Qale?
return Lacy 's corps cross the  Syvash marshes ;return Lacy 's corps take the  fortress of Çufut Qale ;return when  was  #1 ;return when  was  #2 ;return which is the  lowest of #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']