RF stands for radio frequency, and its radiation is a "nonionizing electromagnetic energy characterized by relatively long wavelength, low frequency, and low photon energy," according to the division of Environment, Health and Safety at Berkeley Lab. Radiofrequency energy includes radio waves and microwaves. Microwave radiation is considered a subset of RF radiation. The State Department said it welcomed the report but described it as part of a continuing inquiry, not the final word on the matter. Adding, "the next event may be even more dispersed in time and place, and even more difficult to recognize quickly."
Santa Barbara lasted two hours.
( z0 last :ARG1 ( z1 county :name ( z2 name :op "Santa" :op "Barbara" ) ) :ARG2 ( z3 temporal-quantity :quant 2 :unit ( z4 hour ) ) )
(z0 / last-01
    :ARG1 (z1 / county
              :name (z2 / name
                        :op1 "Santa"
                        :op2 "Barbara"))
    :ARG2 (z3 / temporal-quantity
              :quant 2
              :unit (z4 / hour)))
Santa Barbara lasted two hours .
z1 :name z2
z2 :op1 2
z2 :op2 1
z0 :ARG1 z1
z3 :quant 0
z0 :ARG2 z3
z3 :unit z4