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Sentence
Span Details
日本
Japannoun
に
direction, time, indirect object, or target markergrammar
は
topic markergrammar
高密度
high densitynoun
の
possession, attribution, nominalizer, or nominal linkergrammar
地震観測網
seismic network; seismic arraynoun
が
subject markergrammar
整備
maintenance; servicing; development; improvement; putting in placenoun, suru verb
され
passive, potential, or respect auxiliary-> されるgrammar
ている。
ongoing or resultant stategrammar