Question: What nationality do Pucadyil Ittoop John and Meghnad Saha share?

Context articles: Eutopian Euphorians
Indian Physical Society
Dr. Meghnad Saha College
Pucadyil Ittoop John
Saha ionization equation
Southern Avenue, Kolkata
Saha Institute of Nuclear Physics
Meghnad Saha
Dr. Meghnath Saha College
Meghnad Saha Institute of Technology

Eutopian Euphorians is the annual Cultural fest organised by Meghnad Saha Institute of Technology, held during March–April every year.
 The fest typically goes for 2–3 days and is held at different venues in Kolkata.
The Indian Physical Society is a professional society of physicists in India.
 It was formally established in 1934 by pioneering Indian physicist Meghnad Saha.
 The society's stated objectives are to promote the progress and uphold the cause of both pure and applied physics in India, to encourage publications in physics and related areas, to publisher books, journals, proceedings etc., to organize conferences, advise government bodies, and to secure and administer funds, grants and endowments for the furtherance of scientific research.
Dr. Meghnad Saha College is a college in Itahar in the Uttar Dinajpur district of West Bengal, India.
 The college is affiliated to University of Gour Banga, offering undergraduate courses.
P. I. John is a prominent Indian plasma physicist.
 He occupies the Meghnad Saha Chair in Plasma Science and Technology at the Institute for Plasma Research.
The Saha ionization equation, also known as the Saha–Langmuir equation, is an expression that relates the ionization state of an element to the temperature and pressure.
 The equation is a result of combining ideas of quantum mechanics and statistical mechanics and is used to explain the spectral classification of stars.
 The expression was developed by the Indian astrophysicist Meghnad Saha in 1920, and later (1923) by Irving Langmuir.
Southern Avenue, now renamed Dr Meghnad Saha Sarani, is an avenue in south Kolkata connecting Gol Park with Kalighat.
 It falls under the Ballygunge area.
 It is a 3 km road with a centre boulevard that runs east to west from Gariahat Road on the east to Shyama Prasad Mukherjee Road on the west touching Sarat Bose Road (near Lake Stadium) on its way.
The Saha Institute of Nuclear Physics (SINP) is an institution of basic research and training in physical and biophysical sciences located in Bidhannagar, Kolkata, India.
 The institute is named after the famous Indian physicist Meghnad Saha.
Meghnad Saha FRS (6 October 1893 – 16 February 1956) was an Indian astrophysicist best known for his development of the Saha ionization equation, used to describe chemical and physical conditions in stars.
 Saha was the first scientist to relate a star's spectrum to its temperature, developing thermal ionization equations that have been foundational in the fields of astrophysics and astrochemistry.
 He was repeatedly and unsuccessfully nominated for the Nobel Prize in Physics.
 Saha was also politically active and was elected in 1952 to India's parliament.
Dr. Meghnad Saha College is a college in Itahar in the Uttar Dinajpur district of West Bengal, India.
 The college is affiliated to University of Gour Banga, offering undergraduate courses.
Meghnad Saha Institute of Technology (MSIT), is an engineering and management college located in Kolkata, India.