| http://www.w3.org/ns/prov#value | - The transition metal compound (A-2) is a transition metal compound having at least two transition metals in which at least one metal is bonded to at least one ligand having a cyclopentadienyl skeleton, said at least two metals are a metal selected from Zr, Ti, Hf, V, Nb, Ta, Cr, Mo, W and lanthanoid metals and are different from each other.
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