sentence: Our species has achieved great things , but despite all the great discoveries , there is still one problem we have not been able to solve , a problem that has been haunting us since time immemorial : racism .
modified: Our specie has achieved great things , but despite all the great discoveries , there is still one problem we have not been able to suppress , a problem that has been haunting us since unmemorable times : racism .
transformation: NOUN:NUM, VERB, OTHER