Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.

Example Input: Sperm is the male reproductive cell and is derived from the Greek word ( σπέρμα ) sperma ( meaning `` seed '' ) . In the types of sexual reproduction known as anisogamy and its subtype oogamy , there is a marked difference in the size of the gametes with the smaller one being termed the `` male '' or sperm cell . A uniflagellar sperm cell that is motile is referred to as a spermatozoon , whereas a non-motile sperm cell is referred to as a spermatium . Sperm cells can not divide and have a limited life span , but after fusion with egg cells during fertilization , a new organism begins developing , starting as a totipotent zygote . The human sperm cell is haploid , so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell . In mammals , sperm develops in the testicles , stored in the epididymis , and is released from the penis .
Example Output: Sperm

Example Input: Hypertension ( HTN or HT ) , also known as high blood pressure ( HBP ) , is a long - term medical condition in which the blood pressure in the arteries is persistently elevated . High blood pressure usually does not cause symptoms . Long - term high blood pressure , however , is a major risk factor for coronary artery disease , stroke , heart failure , peripheral vascular disease , vision loss , and chronic kidney disease .
Example Output: Hypertension

Example Input: The Treaty of Guadalupe Hidalgo ( Tratado de Guadalupe Hidalgo in Spanish ) , officially titled the Treaty of Peace , Friendship , Limits and Settlement between the United States of America and the Mexican Republic , is the peace treaty signed on February 2 , 1848 , in the Villa de Guadalupe Hidalgo ( now a neighborhood of Mexico City ) between the United States and Mexico that ended the Mexican -- American War ( 1846 -- 1848 ) . The treaty came into force on July 4 , 1848 .
Example Output:
Treaty of Guadalupe Hidalgo