5675
Iron sequestration by the human host is a first line defence against respiratory pathogens like Moraxella catarrhalis , which consequently experiences a period of iron starvation during colonization .
 Chemical: Iron; Chemical: iron
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Iron; Chemical: iron