▁of ▁the ▁Future ▁ ▁References ▁▁ ▁Category : 1 9 0 7 ▁birth s ▁Category : 1 9 8 5 ▁death s ▁Category : D utch ▁academ ics ▁Category : D utch ▁civil ▁servants ▁Category : D utch ▁soci olog ists ▁Category : D utch ▁Jews ▁Category : D utch ▁corpor ate ▁direct ors ▁Category : J ew ish ▁Dutch ▁polit icians ▁Category : J ew ish ▁social ists ▁Category : Lab our ▁Party ▁( N ether lands ) ▁polit icians ▁Category : D em ocr atic ▁Social ists ▁' 7 0 ▁polit icians ▁Category : M embers ▁of ▁the ▁Senate ▁( N ether lands ) ▁Category : F ut uro log ists ▁Category : Bus iness people ▁from ▁Amsterdam ▁Category : Univers ity ▁of ▁Amsterdam ▁al umn i ▁Category : Er as mus ▁University ▁Rot ter dam ▁fac ulty ▁Category : Direct ors ▁of ▁the ▁Bureau ▁for ▁Econom ic ▁Policy ▁Analysis <0x0A> </s> ▁Say t ' u qu cha ▁or ▁Say t ' u ▁Qu cha ▁( Que ch ua ▁su yt ' u , ▁say t ' u ▁rect angu ar , ▁qu cha ▁lake , ▁l ago on , ▁" rect angular ▁lake ", ▁his pan ic ized ▁spell ings ▁S ait oc och a , ▁Say to co cha ) ▁is ▁a ▁lake ▁in ▁Peru ▁located ▁in ▁the ▁P uno ▁Region , ▁L ampa ▁Province , ▁Par at ía ▁District . ▁It ▁is ▁situated ▁at ▁a ▁height ▁of ▁about ▁, ▁about ▁ 3 . 1 3   km ▁long