Design an ER schema for keeping track of information about votes taken in the U.S. House of Representatives during the current two-year congressional session. The database needs to keep track of each U.S. STATE's Name(e.g., 'Texas', 'New York', 'California') and include the Region of the state (whose domain is {'Northeast', 'Midwest', 'Southeast', 'Southwest', 'west'}). Each CONGRESS_PERSON in the House of Representatives is described by his or her Name, plus the Discrict represented, the Start_date when the congressperson was first elected, the political Party to which he or she belongs (whose domain is {'Republican', 'Democratic', 'Independent', 'Other'}). The database keeps track of each BILL (i.e., proposed law), including the Bill_name, the Date_of_vote on the bill, whether the bill Passed_or_failed (whose domain is {'Yes', 'No'}), and the sponsor(the congressperson(s) who sponsored--that is, proposed--the bill). The database also keeps track of how each congressperson voted on each bill(domain of Vote attribute is {'Yes', 'No', 'Abstain', 'Absent'}).

Additional information: (1) There are 435 congresspersons in the U.S. House of Representatives; (2) States have between 1 and 52 representatives; (3) A bill has to be proposed by at least 1 congressperson; and (4) A congressperson can only represent one state.

use the (min, max) notation to specify relationship cardinality. Please also state any assumptions you make.