assassination of Augusto Unceta Barrenechea
... that the assassination of Augusto Unceta Barrenechea was the Basque separatist group ETA's deadliest attack of 1977, and marked the beginning of a more violent phase in the group's operations?
... that the <b id="mwBCw"><a href="./Assassination_of_Augusto_Unceta_Barrenechea" id="mwBC0" rel="mw:WikiLink" title="Assassination of Augusto Unceta Barrenechea">assassination of Augusto Unceta Barrenechea</a></b> was the Basque separatist group <a href="./ETA_(separatist_group)" id="mwBC4" rel="mw:WikiLink" title="ETA (separatist group)">ETA</a>'s deadliest attack of 1977, and marked the beginning of a more violent phase in the group's operations?