椅子が二つ空いていた。

Sentence Analyzer

椅子 二つ 空いていた

English Translation

Two seats were vacant.

Furigana

椅子(いす)(ふた)()いていた。

Romanji

Isu ga futatsu aiteita.

Words

椅子 (いす)
chair; stool; post; office; position
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
二つ (ふたつ)
two
開く (あく)
to open (e.g. doors); to open (e.g. business, etc.); to be empty; to be vacant; to be available; to be free; to be open (e.g. neckline, etc.); to have been opened (of one's eyes, mouth, etc.); to come to an end; to open (one's eyes, mouth, etc.); to have a hole; to form a gap; to have an interval (between events)

Kanji

Reading: 
Meaning: chair
Readings: シ、 ス、 ツ、 こ、 -こ、 ね
Meanings: child, sign of the rat, 11PM-1AM, first sign of Chinese zodiac
Readings: ニ、 ジ、 ふた、 ふた.つ、 ふたたび
Meanings: two, two radical (no.2)
Readings: クウ、 そら、 あ.く、 あ.き、 あ.ける、 から、 す.く、 す.かす、 むな.しい
Meanings: empty, sky, void, vacant, vacuum