Very little, it could be argued. Trained study staff conducted semi-structured interviews with participants before the pandemic, between April 2018 and August 2019. Most of these causes and factors are social, economic, and political in character. As such, they will admit only of solutions that are similarly social, economic, and political. Participants were also interviewed during personal conversations, which were taped and manually transcribed.
Trained study staff served on the pandemic committee.
( z0 serve :ARG0 ( z1 person :ARG1-of ( z2 train ) :ARG2-of ( z3 staff :mod ( z4 study ) ) ) :ARG2 ( z5 committee :mod ( z6 pandemic ) ) )
(z0 / serve-01
    :ARG0 (z1 / person
              :ARG1-of (z2 / train-01)
              :ARG2-of (z3 / staff-01
                           :mod (z4 / study-01)))
    :ARG2 (z5 / committee
              :mod (z6 / pandemic)))
Trained study staff served on the pandemic committee .
z1 :ARG1-of z2
z1 :ARG2-of z3
z3 :mod z4
z0 :ARG0 z1
z5 :mod z6
z0 :ARG2 z5