By 10:45 there was, however, another set of fighters circling Washington that had entirely different rules of engagement.
( ( By 10:45 ) ( there ( ( ( ( ( was , ) however ) , ) ( ( another set ) ( of ( fighters ( circling ( Washington ( that ( had ( ( ( entirely different ) rules ) ( of engagement ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN By) (NP (CD 10:45))) (NP (EX there)) (VP (VBD was) (, ,) (ADVP (RB however)) (, ,) (NP (NP (DT another) (NN set)) (PP (IN of) (NP (NP (NNS fighters)) (VP (VBG circling) (NP (NP (NNP Washington)) (SBAR (WHNP (WDT that)) (S (VP (VBD had) (NP (NP (ADJP (RB entirely) (JJ different)) (NNS rules)) (PP (IN of) (NP (NN engagement))))))))))))) (. .)))
The rules of engagement for fighters in the air over Washington on that day were different from normal.
( ( ( The rules ) ( of ( engagement ( for ( fighters ( in ( ( the air ) ( over ( Washington ( on ( that day ) ) ) ) ) ) ) ) ) ) ) ( ( were ( different ( from normal ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS rules)) (PP (IN of) (NP (NP (NN engagement)) (PP (IN for) (NP (NP (NNS fighters)) (PP (IN in) (NP (NP (DT the) (NN air)) (PP (IN over) (NP (NP (NNP Washington)) (PP (IN on) (NP (DT that) (NN day)))))))))))) (VP (VBD were) (ADJP (JJ different) (PP (IN from) (ADJP (JJ normal))))) (. .)))