Output by OPEC oil producers has reached record levels, the International Energy Agency said Thursday, raising fears a global oil glut will continue to weigh on markets unless the cartel agrees on a cut.

Japan Today

S Output どんな→ [by] OPEC oil producers
V [has reached]
O (record) levels

S (the International Energy) Agency
V [said]
O (that)

S [raising]
O fears
どんな→ (that省略 同格)

S (a global oil) glut
V [will continue]
O [to weigh]
どこ→ [on] markets

S the cartel
V [agrees]
なんの → [on] a cut