Analyzer
Sentence analysis
8Spans
Sentence
Span Details
この
this; last (couple of years, etc.); these; past; you (as in "you liar")-> 此のpre-noun adjective
難問
difficult question; difficult problem; perplexitynoun, suru verb
を
object markergrammar
解く
untie; unfasten; undo; unsew; unstitch; solve; work out; answer; dispel; clear up; remove (suspicion); cancel; lift; release; comb; untangle (hair)godan verb
の
possession, attribution, nominalizer, or nominal linkergrammar
は
topic markergrammar
至難の業
Herculean task; next-to-impossible undertakingexpression, noun
だ。
plain copulagrammar