Ecevit, one of the most senior Turkish politicians, was unable to secure the necessary support from the parties represented in the Parliament in order to form his government.
Ecevit is the most senior Turkish politician.
The text says he is "one of the most senior"
( z1 have-degree :ARG1 ( z2 person :name ( z3 name :op "Ecevit" ) ) :ARG2 ( z4 senior ) :ARG3 ( z5 most ) :ARG5 ( z6 person :ARG0-of ( z7 have-org-role :ARG1 ( z8 country :name ( z9 name :op "Turkey" ) ) :ARG2 ( z10 politician ) ) ) )