2119
this year 's nobel laureates in physiology or medicine made the remarkable and unexpected discovery that inflammation in the stomach ( gastritis ) as well as ulceration of the stomach or duodenum ( peptic ulcer disease ) is the result of an infection of the stomach caused by the bacterium helicobacter pylori .
 cause effect: infection, bacterium
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
 Entity Pairs:  infection, bacterium 
Answer:
 cause effect: infection, bacterium