You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
European_Central_Bank

Context:
Rescue operations involving sovereign debt have included temporarily moving bad or weak assets off the balance sheets of the weak member banks into the balance sheets of the European Central Bank. Such action is viewed as monetisation and can be seen as an inflationary threat, whereby the strong member countries of the ECB shoulder the burden of monetary expansion (and potential inflation) to save the weak member countries. Most central banks prefer to move weak assets off their balance sheets with some kind of agreement as to how the debt will continue to be serviced. This preference has typically led the ECB to argue that the weaker member countries must:

Question:
Where do bad and weak assets get moved in times of soverign debt crisis?

the balance sheets of the European Central Bank