I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Guinea-Bissau's GDP per capita is one of the lowest in the world, and its Human Development Index is one of the lowest on earth. More than two-thirds of the population lives below the poverty line. The economy depends mainly on agriculture; fish, cashew nuts and ground nuts are its major exports."? 

Other than cashew nuts, what type of nuts does Guinea-Bissau's economy depend on?