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During the last six months of the war in Europe , together with the Dutch hydraulics engineer Lt. C L M Lambrechtsen van Ritthem , he advised the Chief Engineer Second Army , Brigadier " Ginger " Campbell on the “ opposed crossing of water obstacles ” , so that the longest floating Bailey bridge in WW2 could be constructed at Gennep , the Netherlands .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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