
Are the following mentions coreferent?:
<m> earthquakes </m> in Indonesia's Meteorology and Geophysics Agency ( BMG) said that there were two powerful earthquakes which flattened buildings and killed at least one person. 
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<m> 6 . 1 magnitude earthquake </m> in Powerful 6. 1 magnitude earthquake injures dozens in Indonesia's Aceh province Powerful 6. 1 magnitude earthquake injures dozens in Indonesia's Aceh province 