claim: Doxycycline may not cause teeth to change color.
evidence: Sukhumala Marasri -LRB- สขมาลมารศร ; 10 May 1861 -- 9 July 1927 -RRB- was a daughter of King Mongkut -LRB- Rama IV -RRB- and his concubine , Samli .. Mongkut. Mongkut. Her given name was Princess Sukhumala Marasri .. She was later one of the four consorts of King Chulalongkorn -LRB- Rama V -RRB- and was also his half-sister .. Chulalongkorn. Chulalongkorn