Tens of thousands of women marched through cities in Venezuela to protest President Nicolás Maduro.The protesters called for peace after weeks of violent protests in the country. At least 37 people have died in anti-Maduro protests since early April.Protesters call for the presidential election to be moved forward from 2018 opposition activists to be freed and humanitarian aid from abroad.Maduro plans to set up a constituent assembly with extended powers to control the crisis-hit country.