と考えられる/と考えられている => one can think that; it is conceivable that; considered ~ N2
... と考えられている => one can think that; it is conceivable that; considered ~ N2
Confirm
... ものと考えられる => one can think that; it is conceivable that; considered ~ N2
Of course
と([思「おも」]う、[言「い」]う、[考「かんが」]える) => That A N4
Particles
... ものと考えられている => one can think that; it is conceivable that; considered ... N2
Of course
…ものと考えられている => one can think that; it is conceivable that; considered ... N2
Of course
かねる => unable to do something; can’t do something N2
ねばならない/ねばならぬ/ねば => have to do; must; should ~ N2
~にたえる (耐える)    => bear doing ~ N1
ね => isn't it? right? eh? N5
... と考られる => one can think that; it is conceivable that; considered ... N3
Speculation
とみえて/とみえる => It seems that ~ N1