An opposition coalition in Guinea-Bissau has won an overall majority in parliament following elections on Sunday. With this result, President Umaro Sissoco Embaló will have to share power with a prime minister nominated by the PAI-Terra Ranka coalition, which includes the former ruling PAIGC party.<br />''  <br />'' According to the electoral commission, the coalition won 54 out of 102 seats, with Mr Embaló's Madem-G15 party taking 29.<br />''  <br />'' For years the small West African nation has undergone political turmoil and numerous coups and coup plots.  <br />''