which famous commander led the battle of aldenhoven and was involved in the siege of ypres ?
SELECT DISTINCT var_uri where brack_open dbr_Battle_of_Aldenhoven_ attr_open 1794 attr_close dbo_commander var_uri sep_dot dbr_Siege_of_Ypres_ attr_open 1794 attr_close dbo_commander var_uri brack_close