( ( The ( flametube tests ) ) ( ( were ( followed ( by ( ( ( ( sector tests ) ( that ( ( developed ( combustor concepts ) ) ( with ( real ( engine hardware ) ) ) ) ) ) , ) ( such ( as ( fuel ( air atomizers ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ flametube) (NNS tests)) (VP (VBD were) (VP (VBN followed) (PP (IN by) (NP (NP (NN sector) (NNS tests)) (SBAR (WHNP (WDT that)) (S (VP (VBD developed) (NP (NN combustor) (NNS concepts)) (PP (IN with) (NP (JJ real) (NN engine) (NN hardware)))))) (, ,) (PP (JJ such) (IN as) (NP (NN fuel) (NN air) (NNS atomizers))))))) (. .)))
The flametube tests were followed by sector tests that developed combustor concepts with real engine hardware, such as fuel air atomizers.
(ROOT (S (NP (NNP Air)) (VP (VBZ is) (VP (VBN made) (PP (IN of) (NP (NNS atoms))))) (. .)))