REPUBLICAN Sinn Fein yesterday again called for the release of Ms Josephine Hayden from prison in Limerick.a second heart attack this week, it was claimed. It is understood Ms Hayden was returned to hospital after complaining of feeling unwell but sources say she did not have a second attack. RSF said the release of what they claim to be "the only woman political prisoner" in the Republic was justified on humanitarian grounds. Ms Hayden suffered a mild heart attack a month ago.