On the morning of 1 June, there was a blackout throughout most of the capital caused by urban commandos of the Farabundo Marti National Liberation Front (FMLN).
The blackout lasted till the 1st
It started on the first it dosen't say how long it lasted at all.
( z1 blackout :duration ( z2 till :op ( z3 date-entity :day 1 ) ) )