Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.

Sentence: 'But even though it 's the poorest country in South America , Bolivia is surprisingly self-sufficient with ample supplies of oil , natural gas and other natural resources .', Argument/Subject 1: 'bolivium', Argument/Subject 2: 'south america'
be country in

Sentence: 'Engrossed Substitute Senate Bill 5121 was signed into law by the Governor on May 9 .', Argument/Subject 1: 'bill', Argument/Subject 2: 'governor'
sign by

Sentence: 'Jackson stars in Black Snake Moan , too , btw .', Argument/Subject 1: 'jackson', Argument/Subject 2: 'black snake moan'

star in