Assertion: terrorist group's activity | /r/CapableOf | become serious
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Source sentences:
text: India's Research and Analysis Wing has been accused of training and arming the Sri Lankan Tamil group, LTTE, during the 1970s when it was not considered a terrorist organization by any country but it later withdrew its support in the 1980s, when the activities of LTTE became serious, becoming the first country to ban LTTE as a terrorist organization.