keywords: hostage colombia bogota colombian rebels
text: Colombia Rebel Hostage Tape Pressures Government &lt;p&gt;&lt;/p&gt;&lt;p&gt; BOGOTA, Colombia (Reuters) - Colombian Marxist rebels keptup pressure on the government to release imprisoned guerrillas,releasing a videotape of 12 former congressmen they kidnapped30 months ago and want to swap for their comrades.&lt;/p&gt;