"Currently it is a problem to make really small, nanoscale magnetic particles from iron, iron oxide, or the other magnetic materials known to date," Christou said.
(the other magnetic materials; known; to date) (Currently it is a problem; said; Christou) Context(Currently it is a problem said,List([1, 162))):(it; is; a problem to make really small, nanoscale magnetic particles from iron, iron oxide, or the other magnetic materials; T:Currently)
Currently it is a problem said,List([1, 162))
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a problem to make really small, nanoscale magnetic particles from iron, iron oxide, or the other magnetic materials T:Currently