18789
 Abiomed Inc. , Danvers , Mass. , the maker of the AbioCor artificial heart , agreed to buy closely held Impella CardioSystems , Aachen , Germany , for about $ 44.8 million in cash and stock . 
 location contains: Germany, Aachen
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 location contains: Germany, Aachen