( They ( all ( ( have ( in ( ( ( ( ( ( ( common : ) ( ( ( ( electric motors ) , ) ( a ( freezable canister ) ) ) ( -LRB- ( ( that ( replaces ( the ( ( ice and ) salt ) ) ) ) -RRB- ) ) ) ) , ) ( ( relatively small ) size ) ) , ) and ) ( similar price ) ) ) ) . ) ) )
(ROOT (S (NP (PRP They)) (ADVP (DT all)) (VP (VBP have) (PP (IN in) (NP (NP (NP (JJ common)) (: :) (NP (NP (JJ electric) (NNS motors)) (, ,) (NP (DT a) (JJ freezable) (NN canister)) (PRN (-LRB- -LRB-) (SBAR (WHNP (WDT that)) (S (VP (VBZ replaces) (NP (DT the) (NN ice) (CC and) (NN salt))))) (-RRB- -RRB-)))) (, ,) (NP (ADJP (RB relatively) (JJ small)) (NN size)) (, ,) (CC and) (NP (JJ similar) (NN price))))) (. .)))
They all have in common: electric motors, a freezable canister (that replaces the ice and salt), relatively small size, and similar price.
(ROOT (S (NP (DT All) (NNS cells)) (VP (VBP have) (NP (NP (DT the) (JJ small) (NN size)) (PP (IN in) (NP (JJ common))))) (. .)))